diff --git a/packages/compiler-cli/ngcc/src/execution/cluster/lock_file_with_child_process.ts b/packages/compiler-cli/ngcc/src/execution/cluster/lock_file_with_child_process.ts
deleted file mode 100644
index b6354976a6..0000000000
--- a/packages/compiler-cli/ngcc/src/execution/cluster/lock_file_with_child_process.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. 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
- */
-
-/// <reference types="node" />
-
-import {ChildProcess} from 'child_process';
-import * as cluster from 'cluster';
-
-import {AbsoluteFsPath} from '../../../../src/ngtsc/file_system';
-import {LockFileWithChildProcess} from '../../locking/lock_file_with_child_process';
-
-
-/**
- * A `LockFileWithChildProcess` that is `cluster`-aware and does not spawn unlocker processes from
- * worker processes (only from the master process, which does the locking).
- */
-export class ClusterLockFileWithChildProcess extends LockFileWithChildProcess {
-  write(): void {
-    if (!cluster.isMaster) {
-      // This is a worker process:
-      // This method should only be on the master process.
-      throw new Error('Tried to create a lock-file from a worker process.');
-    }
-
-    return super.write();
-  }
-
-  protected createUnlocker(path: AbsoluteFsPath): ChildProcess|null {
-    if (cluster.isMaster) {
-      // This is the master process:
-      // Create the unlocker.
-      return super.createUnlocker(path);
-    }
-
-    return null;
-  }
-}
diff --git a/packages/compiler-cli/ngcc/src/locking/lock_file_with_child_process/index.ts b/packages/compiler-cli/ngcc/src/locking/lock_file_with_child_process/index.ts
index a544addf0d..9dcb848829 100644
--- a/packages/compiler-cli/ngcc/src/locking/lock_file_with_child_process/index.ts
+++ b/packages/compiler-cli/ngcc/src/locking/lock_file_with_child_process/index.ts
@@ -78,7 +78,7 @@ export class LockFileWithChildProcess implements LockFile {
     }
   }
 
-  protected createUnlocker(path: AbsoluteFsPath): ChildProcess|null {
+  protected createUnlocker(path: AbsoluteFsPath): ChildProcess {
     this.logger.debug('Forking unlocker child-process');
     const logLevel =
         this.logger.level !== undefined ? this.logger.level.toString() : LogLevel.info.toString();
diff --git a/packages/compiler-cli/ngcc/src/main.ts b/packages/compiler-cli/ngcc/src/main.ts
index 0d072866a1..1f63a029bb 100644
--- a/packages/compiler-cli/ngcc/src/main.ts
+++ b/packages/compiler-cli/ngcc/src/main.ts
@@ -27,7 +27,6 @@ import {EntryPointFinder} from './entry_point_finder/interface';
 import {TargetedEntryPointFinder} from './entry_point_finder/targeted_entry_point_finder';
 import {AnalyzeEntryPointsFn, CreateCompileFn, Executor} from './execution/api';
 import {ClusterExecutor} from './execution/cluster/executor';
-import {ClusterLockFileWithChildProcess} from './execution/cluster/lock_file_with_child_process';
 import {ClusterPackageJsonUpdater} from './execution/cluster/package_json_updater';
 import {SingleProcessExecutorAsync, SingleProcessExecutorSync} from './execution/single_process_executor';
 import {CreateTaskCompletedCallback, PartiallyOrderedTasks, Task, TaskProcessingOutcome, TaskQueue} from './execution/tasks/api';
@@ -429,8 +428,7 @@ function getCreateTaskCompletedCallback(
 function getExecutor(
     async: boolean, inParallel: boolean, logger: Logger, pkgJsonUpdater: PackageJsonUpdater,
     fileSystem: FileSystem, createTaskCompletedCallback: CreateTaskCompletedCallback): Executor {
-  const lockFile = inParallel ? new ClusterLockFileWithChildProcess(fileSystem, logger) :
-                                new LockFileWithChildProcess(fileSystem, logger);
+  const lockFile = new LockFileWithChildProcess(fileSystem, logger);
   if (async) {
     // Execute asynchronously (either serially or in parallel)
     const locker = new AsyncLocker(lockFile, logger, 500, 50);
diff --git a/packages/compiler-cli/ngcc/test/execution/cluster/lock_file_with_child_process_spec.ts b/packages/compiler-cli/ngcc/test/execution/cluster/lock_file_with_child_process_spec.ts
deleted file mode 100644
index 17501508d5..0000000000
--- a/packages/compiler-cli/ngcc/test/execution/cluster/lock_file_with_child_process_spec.ts
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. 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
- */
-
-/// <reference types="node" />
-
-import {ChildProcess} from 'child_process';
-import * as cluster from 'cluster';
-
-import {getFileSystem} from '../../../../src/ngtsc/file_system';
-import {runInEachFileSystem} from '../../../../src/ngtsc/file_system/testing';
-import {ClusterLockFileWithChildProcess} from '../../../src/execution/cluster/lock_file_with_child_process';
-import {LockFileWithChildProcess} from '../../../src/locking/lock_file_with_child_process';
-import {MockLogger} from '../../helpers/mock_logger';
-import {mockProperty} from '../../helpers/spy_utils';
-
-
-runInEachFileSystem(() => {
-  describe('ClusterLockFileWithChildProcess', () => {
-    const runAsClusterMaster = mockProperty(cluster, 'isMaster');
-    const mockUnlockerProcess = {} as ChildProcess;
-    let lockFileWithChildProcessSpies:
-        Record<'createUnlocker'|'read'|'remove'|'write', jasmine.Spy>;
-
-    beforeEach(() => {
-      lockFileWithChildProcessSpies = {
-        createUnlocker: spyOn(LockFileWithChildProcess.prototype as any, 'createUnlocker')
-                            .and.returnValue(mockUnlockerProcess),
-        read: spyOn(LockFileWithChildProcess.prototype, 'read').and.returnValue('{unknown}'),
-        remove: spyOn(LockFileWithChildProcess.prototype, 'remove'),
-        write: spyOn(LockFileWithChildProcess.prototype, 'write'),
-      };
-    });
-
-    it('should be an instance of `LockFileWithChildProcess`', () => {
-      const lockFile = new ClusterLockFileWithChildProcess(getFileSystem(), new MockLogger());
-
-      expect(lockFile).toEqual(jasmine.any(ClusterLockFileWithChildProcess));
-      expect(lockFile).toEqual(jasmine.any(LockFileWithChildProcess));
-    });
-
-    describe('write()', () => {
-      it('should create the lock-file when called on the cluster master', () => {
-        runAsClusterMaster(true);
-        const lockFile = new ClusterLockFileWithChildProcess(getFileSystem(), new MockLogger());
-
-        expect(lockFileWithChildProcessSpies.write).not.toHaveBeenCalled();
-
-        lockFile.write();
-        expect(lockFileWithChildProcessSpies.write).toHaveBeenCalledWith();
-      });
-
-      it('should throw an error when called on a cluster worker', () => {
-        runAsClusterMaster(false);
-        const lockFile = new ClusterLockFileWithChildProcess(getFileSystem(), new MockLogger());
-
-        expect(() => lockFile.write())
-            .toThrowError('Tried to create a lock-file from a worker process.');
-        expect(lockFileWithChildProcessSpies.write).not.toHaveBeenCalled();
-      });
-    });
-
-    describe('createUnlocker()', () => {
-      it('should create the unlocker when called on the cluster master', () => {
-        runAsClusterMaster(true);
-        const lockFile = new ClusterLockFileWithChildProcess(getFileSystem(), new MockLogger());
-
-        lockFileWithChildProcessSpies.createUnlocker.calls.reset();
-
-        expect((lockFile as any).createUnlocker(lockFile.path)).toBe(mockUnlockerProcess);
-        expect(lockFileWithChildProcessSpies.createUnlocker).toHaveBeenCalledWith(lockFile.path);
-      });
-
-      it('should not create the unlocker when called on a cluster worker', () => {
-        runAsClusterMaster(false);
-        const lockFile = new ClusterLockFileWithChildProcess(getFileSystem(), new MockLogger());
-
-        expect((lockFile as any).createUnlocker(lockFile.path)).toBeNull();
-        expect(lockFileWithChildProcessSpies.createUnlocker).not.toHaveBeenCalled();
-      });
-    });
-  });
-});