diff --git a/packages/bazel/package.json b/packages/bazel/package.json
index 6caa8554faf..3023ae53fcf 100644
--- a/packages/bazel/package.json
+++ b/packages/bazel/package.json
@@ -11,8 +11,7 @@
     "api-extractor": "./src/api-extractor/index.js",
     "ngc-wrapped": "./src/ngc-wrapped/index.js",
     "packager": "./src/ng_package/packager.js",
-    "xi18n": "./src/ngc-wrapped/extract_i18n.js",
-    "modify_tsconfig": "./src/modify_tsconfig.js"
+    "xi18n": "./src/ngc-wrapped/extract_i18n.js"
   },
   "typings": "./src/ngc-wrapped/index.d.ts",
   "bazelBin": {
diff --git a/packages/bazel/src/BUILD.bazel b/packages/bazel/src/BUILD.bazel
index 5a5ec0b0093..e1498ab4dc9 100644
--- a/packages/bazel/src/BUILD.bazel
+++ b/packages/bazel/src/BUILD.bazel
@@ -1,4 +1,3 @@
-load("@build_bazel_rules_nodejs//:index.bzl", "nodejs_binary")
 
 # BEGIN-DEV-ONLY
 package(default_visibility = ["//packages/bazel:__subpackages__"])
@@ -7,13 +6,4 @@ filegroup(
     name = "package_assets",
     srcs = glob(["*"]),
 )
-
-nodejs_binary(
-    name = "modify_tsconfig",
-    data = [
-        "modify_tsconfig.js",
-    ],
-    entry_point = ":modify_tsconfig.js",
-    visibility = ["//visibility:public"],
-)
 # END-DEV-ONLY
diff --git a/packages/bazel/src/modify_tsconfig.js b/packages/bazel/src/modify_tsconfig.js
deleted file mode 100755
index 55d3c6a7ccc..00000000000
--- a/packages/bazel/src/modify_tsconfig.js
+++ /dev/null
@@ -1,54 +0,0 @@
-/**
- * @license
- * Copyright Google LLC All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-/**
- * @fileoverview Read a tsconfig.json file intended to produce production mode
- * JS output, modify it to produce esm5 output instead, and write the result
- * to disk.
- */
-const fs = require('fs');
-const path = require('path');
-
-function main(args) {
-  if (args.length < 3) {
-    console.error('Usage: $0 input.tsconfig.json output.tsconfig.json newRoot binDir');
-  }
-
-  const [input, output, newRoot, binDir] = args;
-  const data = JSON.parse(fs.readFileSync(input, {encoding: 'utf-8'}));
-  const {compilerOptions, bazelOptions} = data;
-
-  // Relative path to the execroot that refers to the directory for the ES5 output files.
-  const newOutputBase = path.posix.join(binDir, newRoot);
-
-  // Update the compiler options to produce ES5 output. Also ensure that the new ES5 output
-  // directory is used.
-  compilerOptions['target'] = 'es5';
-  compilerOptions['outDir'] = path.posix.join(compilerOptions['outDir'], newRoot);
-
-  bazelOptions['es5Mode'] = true;
-  bazelOptions['tsickleExternsPath'] =
-      bazelOptions['tsickleExternsPath'].replace(binDir, newOutputBase);
-
-  if (data['angularCompilerOptions']) {
-    const {angularCompilerOptions} = data;
-    // Don't enable tsickle's closure conversions
-    angularCompilerOptions['annotateForClosureCompiler'] = false;
-    // Note: It's important that the "expectedOut" is only modified in a way that still
-    // keeps posix normalized paths. Otherwise this could cause unexpected behavior because
-    // ngc-wrapped is expecting POSIX paths and the TypeScript Bazel rules by default only pass
-    // POSIX paths as well.
-    angularCompilerOptions['expectedOut'] = angularCompilerOptions['expectedOut'].map(
-        f => f.replace(/\.mjs$/, '.js').replace(binDir, newOutputBase));
-  }
-  fs.writeFileSync(output, JSON.stringify(data));
-}
-
-if (require.main === module) {
-  process.exitCode = main(process.argv.slice(2));
-}