diff --git a/_tools/check_mod_exports.ts b/_tools/check_mod_exports.ts
index 1b2888b3c64c..6e4f05153782 100644
--- a/_tools/check_mod_exports.ts
+++ b/_tools/check_mod_exports.ts
@@ -8,7 +8,6 @@ import ts from "npm:typescript";
 const ROOT = new URL("../", import.meta.url);
 const FAIL_FAST = Deno.args.includes("--fail-fast");
 const EXCLUDED_PATHS = [
-  "internal/warn_on_deprecated_api.ts",
   "dotenv/load.ts",
   "path/glob.ts",
   "front_matter/yaml.ts",
diff --git a/deno.json b/deno.json
index ad745fd8a681..6dce2b1ab506 100644
--- a/deno.json
+++ b/deno.json
@@ -12,7 +12,7 @@
     "automation/": "https://raw.githubusercontent.com/denoland/automation/0.10.0/"
   },
   "tasks": {
-    "test": "DENO_NO_DEPRECATION_WARNINGS=1 deno test --unstable-http --unstable-webgpu --doc --allow-all --parallel --coverage --trace-ops",
+    "test": "deno test --unstable-http --unstable-webgpu --doc --allow-all --parallel --coverage --trace-ops",
     "test:browser": "git grep --name-only \"This module is browser compatible.\" | grep -v deno.json | grep -v .github/workflows | grep -v _tools | xargs deno check --config browser-compat.tsconfig.json",
     "fmt:licence-headers": "deno run --allow-read --allow-write ./_tools/check_licence.ts",
     "lint:deprecations": "deno run --allow-read --allow-net --allow-env=HOME ./_tools/check_deprecation.ts",
diff --git a/internal/mod.ts b/internal/mod.ts
deleted file mode 100644
index 33d4eddc3c78..000000000000
--- a/internal/mod.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-/**
- * Internal utilities for the public API of the Deno Standard Library.
- *
- * Note: for internal use only.
- *
- * @module
- */
diff --git a/internal/warn_on_deprecated_api.ts b/internal/warn_on_deprecated_api.ts
deleted file mode 100644
index b9a27ae33a3d..000000000000
--- a/internal/warn_on_deprecated_api.ts
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-// This module is browser compatible.
-
-// deno-lint-ignore no-explicit-any
-const { Deno } = globalThis as any;
-
-const ALREADY_WARNED_DEPRECATED = new Set<string>();
-const ENV_VAR_KEY = "DENO_NO_DEPRECATION_WARNINGS";
-const shouldDisableDeprecatedApiWarning =
-  Deno?.permissions.querySync?.({ name: "env", variable: ENV_VAR_KEY })
-      .state === "granted" && Deno?.env.has(ENV_VAR_KEY);
-
-interface WarnDeprecatedApiConfig {
-  /** The name of the deprecated API. */
-  apiName: string;
-  /** The stack trace of the deprecated API. */
-  stack: string;
-  /** The version in which the API will be removed. */
-  removalVersion: string;
-  /** An optional message to print. */
-  suggestion?: string;
-}
-
-/**
- * Prints a warning message to the console for the given deprecated API.
- *
- * These warnings can be disabled by setting `DENO_NO_DEPRECATION_WARNINGS=1`
- * in the current process.
- *
- * Mostly copied from
- * {@link https://github.com/denoland/deno/blob/c62615bfe5a070c2517f3af3208d4308c72eb054/runtime/js/99_main.js#L101}.
- */
-export function warnOnDeprecatedApi(config: WarnDeprecatedApiConfig) {
-  if (shouldDisableDeprecatedApiWarning) return;
-
-  const key = config.apiName + config.stack;
-  if (ALREADY_WARNED_DEPRECATED.has(key)) return;
-
-  // If we haven't warned yet, let's do some processing of the stack trace
-  // to make it more useful.
-  const stackLines = config.stack.split("\n");
-  stackLines.shift();
-
-  let isFromRemoteDependency = false;
-  const firstStackLine = stackLines[0];
-  if (firstStackLine && !firstStackLine.includes("file:")) {
-    isFromRemoteDependency = true;
-  }
-
-  ALREADY_WARNED_DEPRECATED.add(key);
-  console.log(
-    "%cWarning",
-    "color: yellow; font-weight: bold;",
-  );
-  console.log(
-    `%c\u251c Use of deprecated "${config.apiName}" API.`,
-    "color: yellow;",
-  );
-  console.log("%c\u2502", "color: yellow;");
-  console.log(
-    `%c\u251c This API will be removed in version ${config.removalVersion} of the Deno Standard Library.`,
-    "color: yellow;",
-  );
-  console.log("%c\u2502", "color: yellow;");
-  console.log(
-    `%c\u251c Suggestion: ${config.suggestion}`,
-    "color: yellow;",
-  );
-  if (isFromRemoteDependency) {
-    console.log("%c\u2502", "color: yellow;");
-    console.log(
-      `%c\u251c Suggestion: It appears this API is used by a remote dependency.`,
-      "color: yellow;",
-    );
-    console.log(
-      "%c\u2502             Try upgrading to the latest version of that dependency.",
-      "color: yellow;",
-    );
-  }
-
-  console.log("%c\u2502", "color: yellow;");
-  console.log("%c\u2514 Stack trace:", "color: yellow;");
-  for (let i = 0; i < stackLines.length; i++) {
-    console.log(
-      `%c  ${i == stackLines.length - 1 ? "\u2514" : "\u251c"}\u2500 ${
-        stackLines[i].trim()
-      }`,
-      "color: yellow;",
-    );
-  }
-  console.log();
-}
diff --git a/internal/warn_on_deprecated_api_test.ts b/internal/warn_on_deprecated_api_test.ts
deleted file mode 100644
index 3d13ba5f8b68..000000000000
--- a/internal/warn_on_deprecated_api_test.ts
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import { assertEquals } from "../assert/assert_equals.ts";
-import { warnOnDeprecatedApi } from "./warn_on_deprecated_api.ts";
-
-Deno.test("warnDeprecatedApi()", async () => {
-  const command = new Deno.Command(Deno.execPath(), {
-    args: ["run", "--quiet", "--no-lock", import.meta.url],
-    stderr: "inherit",
-  });
-  const { success, stdout } = await command.output();
-  const output = new TextDecoder().decode(stdout);
-
-  assertEquals(success, true);
-  assertEquals(
-    output,
-    `Warning
-├ Use of deprecated "fn()" API.
-│
-├ This API will be removed in version 1.0.0 of the Deno Standard Library.
-│
-├ Suggestion: Do something else instead.
-│
-└ Stack trace:
-  ├─ at fn (${import.meta.url}:37:12)
-  └─ at ${import.meta.url}:45:31
-
-Hello, world!
-Hello, world!
-END
-`,
-  );
-});
-
-function fn() {
-  warnOnDeprecatedApi({
-    apiName: "fn()",
-    stack: new Error().stack!,
-    removalVersion: "1.0.0",
-    suggestion: "Do something else instead.",
-  });
-  console.log("Hello, world!");
-}
-
-if (import.meta.main) {
-  for (let i = 0; i < 2; i++) fn();
-  console.log("END");
-}