diff --git a/.kokoro/continuous/java8.cfg b/.kokoro/continuous/java8.cfg
deleted file mode 100644
index 495cc7bacd6..00000000000
--- a/.kokoro/continuous/java8.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "REPORT_COVERAGE"
-  value: "true"
-}
diff --git a/.kokoro/nightly/java7.cfg b/.kokoro/nightly/java7.cfg
deleted file mode 100644
index cb24f44eea3..00000000000
--- a/.kokoro/nightly/java7.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java7"
-}
diff --git a/.kokoro/nightly/java8-win.cfg b/.kokoro/nightly/java8-win.cfg
deleted file mode 100644
index b219b38ad4a..00000000000
--- a/.kokoro/nightly/java8-win.cfg
+++ /dev/null
@@ -1,3 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-build_file: "java-spanner/.kokoro/build.bat"
diff --git a/.kokoro/presubmit/clirr.cfg b/.kokoro/presubmit/clirr.cfg
deleted file mode 100644
index ec572442e2e..00000000000
--- a/.kokoro/presubmit/clirr.cfg
+++ /dev/null
@@ -1,13 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "clirr"
-}
\ No newline at end of file
diff --git a/.kokoro/presubmit/integration-cloud-devel.cfg b/.kokoro/presubmit/integration-cloud-devel.cfg
deleted file mode 100644
index 94b698199e1..00000000000
--- a/.kokoro/presubmit/integration-cloud-devel.cfg
+++ /dev/null
@@ -1,22 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "integration-cloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-client-testing"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "java-client-testing"
-}
diff --git a/.kokoro/presubmit/java11-samples.cfg b/.kokoro/presubmit/java11-samples.cfg
deleted file mode 100644
index 2812301e787..00000000000
--- a/.kokoro/presubmit/java11-samples.cfg
+++ /dev/null
@@ -1,34 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java11"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "samples"
-}
-
-# TODO: remove this after we've migrated all tests and scripts
-env_vars: {
-  key: "GCLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_CLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-it-service-account"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "java-it-service-account"
-}
-
diff --git a/.kokoro/presubmit/java11.cfg b/.kokoro/presubmit/java11.cfg
deleted file mode 100644
index 709f2b4c73d..00000000000
--- a/.kokoro/presubmit/java11.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java11"
-}
diff --git a/.kokoro/presubmit/java7.cfg b/.kokoro/presubmit/java7.cfg
deleted file mode 100644
index cb24f44eea3..00000000000
--- a/.kokoro/presubmit/java7.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java7"
-}
diff --git a/.kokoro/presubmit/java8-osx.cfg b/.kokoro/presubmit/java8-osx.cfg
deleted file mode 100644
index 63f547222f5..00000000000
--- a/.kokoro/presubmit/java8-osx.cfg
+++ /dev/null
@@ -1,3 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-build_file: "java-spanner/.kokoro/build.sh"
diff --git a/.kokoro/presubmit/java8-samples.cfg b/.kokoro/presubmit/java8-samples.cfg
deleted file mode 100644
index 49a231b9f2a..00000000000
--- a/.kokoro/presubmit/java8-samples.cfg
+++ /dev/null
@@ -1,34 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "samples"
-}
-
-# TODO: remove this after we've migrated all tests and scripts
-env_vars: {
-  key: "GCLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_CLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-it-service-account"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "java-it-service-account"
-}
-
diff --git a/.kokoro/presubmit/java8-win.cfg b/.kokoro/presubmit/java8-win.cfg
deleted file mode 100644
index b219b38ad4a..00000000000
--- a/.kokoro/presubmit/java8-win.cfg
+++ /dev/null
@@ -1,3 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-build_file: "java-spanner/.kokoro/build.bat"
diff --git a/.kokoro/presubmit/java8.cfg b/.kokoro/presubmit/java8.cfg
deleted file mode 100644
index 495cc7bacd6..00000000000
--- a/.kokoro/presubmit/java8.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "REPORT_COVERAGE"
-  value: "true"
-}
diff --git a/.kokoro/presubmit/linkage-monitor.cfg b/.kokoro/presubmit/linkage-monitor.cfg
deleted file mode 100644
index 083448f9f80..00000000000
--- a/.kokoro/presubmit/linkage-monitor.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "TRAMPOLINE_BUILD_FILE"
-  value: "github/java-spanner/.kokoro/linkage-monitor.sh"
-}
\ No newline at end of file
diff --git a/.kokoro/presubmit/lint.cfg b/.kokoro/presubmit/lint.cfg
deleted file mode 100644
index 6d323c8ae76..00000000000
--- a/.kokoro/presubmit/lint.cfg
+++ /dev/null
@@ -1,13 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "lint"
-}
\ No newline at end of file
diff --git a/.kokoro/presubmit/samples.cfg b/.kokoro/presubmit/samples.cfg
deleted file mode 100644
index 724216504ef..00000000000
--- a/.kokoro/presubmit/samples.cfg
+++ /dev/null
@@ -1,33 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-  key: "TRAMPOLINE_IMAGE"
-  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "samples"
-}
-
-# TODO: remove this after we've migrated all tests and scripts
-env_vars: {
-  key: "GCLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_CLOUD_PROJECT"
-  value: "gcloud-devel"
-}
-
-env_vars: {
-  key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-it-service-account"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "java-it-service-account"
-}
diff --git a/owlbot.py b/owlbot.py
index bc9b537f818..5765d1df17f 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -31,12 +31,8 @@
         ".kokoro/nightly/samples.cfg",
         ".kokoro/build.bat",
         ".kokoro/presubmit/common.cfg",
-        ".kokoro/presubmit/java8-samples.cfg",
-        ".kokoro/presubmit/java11-samples.cfg",
-        ".kokoro/presubmit/samples.cfg",
         ".kokoro/presubmit/graalvm-native.cfg",
         ".kokoro/presubmit/graalvm-native-17.cfg",
-        ".kokoro/release/common.cfg",
         "samples/install-without-bom/pom.xml",
         "samples/snapshot/pom.xml",
         "samples/snippets/pom.xml",
diff --git a/synth.metadata b/synth.metadata
index 9622106469d..9f19ee9c447 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -68,41 +68,16 @@
     ".kokoro/coerce_logs.sh",
     ".kokoro/common.cfg",
     ".kokoro/common.sh",
-    ".kokoro/continuous/java8.cfg",
     ".kokoro/dependencies.sh",
     ".kokoro/nightly/integration.cfg",
     ".kokoro/nightly/java11.cfg",
-    ".kokoro/nightly/java7.cfg",
     ".kokoro/nightly/java8-osx.cfg",
-    ".kokoro/nightly/java8-win.cfg",
     ".kokoro/nightly/java8.cfg",
     ".kokoro/populate-secrets.sh",
-    ".kokoro/presubmit/clirr.cfg",
     ".kokoro/presubmit/dependencies.cfg",
     ".kokoro/presubmit/graalvm-native.cfg",
     ".kokoro/presubmit/integration.cfg",
     ".kokoro/presubmit/java11.cfg",
-    ".kokoro/presubmit/java7.cfg",
-    ".kokoro/presubmit/java8-osx.cfg",
-    ".kokoro/presubmit/java8-win.cfg",
-    ".kokoro/presubmit/java8.cfg",
-    ".kokoro/presubmit/linkage-monitor.cfg",
-    ".kokoro/presubmit/lint.cfg",
-    ".kokoro/release/bump_snapshot.cfg",
-    ".kokoro/release/common.cfg",
-    ".kokoro/release/common.sh",
-    ".kokoro/release/drop.cfg",
-    ".kokoro/release/drop.sh",
-    ".kokoro/release/promote.cfg",
-    ".kokoro/release/promote.sh",
-    ".kokoro/release/publish_javadoc.cfg",
-    ".kokoro/release/publish_javadoc.sh",
-    ".kokoro/release/publish_javadoc11.cfg",
-    ".kokoro/release/publish_javadoc11.sh",
-    ".kokoro/release/snapshot.cfg",
-    ".kokoro/release/snapshot.sh",
-    ".kokoro/release/stage.cfg",
-    ".kokoro/release/stage.sh",
     ".kokoro/trampoline.sh",
     "CODE_OF_CONDUCT.md",
     "CONTRIBUTING.md",