diff --git a/.kokoro/continuous/common.cfg b/.kokoro/continuous/common.cfg
deleted file mode 100644
index 7c8ebc30d..000000000
--- a/.kokoro/continuous/common.cfg
+++ /dev/null
@@ -1,24 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "gax-java/.kokoro/trampoline.sh"
-
-env_vars: {
-  key: "TRAMPOLINE_BUILD_FILE"
-  value: "github/gax-java/.kokoro/build.sh"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "test"
-}
diff --git a/.kokoro/continuous/java11.cfg b/.kokoro/continuous/java11.cfg
deleted file mode 100644
index 709f2b4c7..000000000
--- a/.kokoro/continuous/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/continuous/java8.cfg b/.kokoro/continuous/java8.cfg
deleted file mode 100644
index 3b017fc80..000000000
--- a/.kokoro/continuous/java8.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/java8"
-}
diff --git a/.kokoro/presubmit/common.cfg b/.kokoro/presubmit/common.cfg
deleted file mode 100644
index 7c8ebc30d..000000000
--- a/.kokoro/presubmit/common.cfg
+++ /dev/null
@@ -1,24 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "gax-java/.kokoro/trampoline.sh"
-
-env_vars: {
-  key: "TRAMPOLINE_BUILD_FILE"
-  value: "github/gax-java/.kokoro/build.sh"
-}
-
-env_vars: {
-  key: "JOB_TYPE"
-  value: "test"
-}
diff --git a/.kokoro/presubmit/java11.cfg b/.kokoro/presubmit/java11.cfg
deleted file mode 100644
index 709f2b4c7..000000000
--- 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/java8.cfg b/.kokoro/presubmit/java8.cfg
deleted file mode 100644
index 3b017fc80..000000000
--- a/.kokoro/presubmit/java8.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/java8"
-}