diff --git a/packages/angular_devkit/core/src/terminal/caps.ts b/packages/angular_devkit/core/src/terminal/caps.ts
index 916d731920fa..3ed01e89638a 100644
--- a/packages/angular_devkit/core/src/terminal/caps.ts
+++ b/packages/angular_devkit/core/src/terminal/caps.ts
@@ -7,7 +7,6 @@
  */
 import ReadableStream = NodeJS.ReadableStream;
 import WriteStream = NodeJS.WriteStream;
-import Socket = NodeJS.Socket;
 const supportsColor = require('../../third_party/github.com/chalk/supports-color');
 
 /**
diff --git a/packages/ngtools/webpack/src/diagnostics.ts b/packages/ngtools/webpack/src/diagnostics.ts
index 5052ec9da62b..674aecb7a657 100644
--- a/packages/ngtools/webpack/src/diagnostics.ts
+++ b/packages/ngtools/webpack/src/diagnostics.ts
@@ -6,12 +6,11 @@
  * found in the LICENSE file at https://angular.io/license
  */
 import {
-  CompilerHost, Diagnostic, Diagnostics,
+  Diagnostic, Diagnostics,
   Program, formatDiagnostics, isNgDiagnostic,
 } from '@angular/compiler-cli';
 import * as ts from 'typescript';
 import { time, timeEnd } from './benchmark';
-import { WebpackCompilerHost } from './compiler_host';
 
 export enum DiagnosticMode {
   Syntactic = 1 << 0,
diff --git a/packages/schematics/angular/interface/index.ts b/packages/schematics/angular/interface/index.ts
index d651e5af6184..7e06cfc17ab7 100644
--- a/packages/schematics/angular/interface/index.ts
+++ b/packages/schematics/angular/interface/index.ts
@@ -8,7 +8,6 @@
 import { strings } from '@angular-devkit/core';
 import {
   Rule,
-  SchematicsException,
   Tree,
   apply,
   applyTemplates,
diff --git a/packages/schematics/angular/migrations/update-9/schematic-options_spec.ts b/packages/schematics/angular/migrations/update-9/schematic-options_spec.ts
index bc6c9c3006ca..7e9f3c985a10 100644
--- a/packages/schematics/angular/migrations/update-9/schematic-options_spec.ts
+++ b/packages/schematics/angular/migrations/update-9/schematic-options_spec.ts
@@ -36,15 +36,6 @@ describe('Migration to version 9', () => {
     });
 
     describe('schematic options', () => {
-      function getI18NConfig(localId: string): object {
-        return {
-          outputPath: `dist/my-project/${localId}/`,
-          i18nFile: `src/locale/messages.${localId}.xlf`,
-          i18nFormat: 'xlf',
-          i18nLocale: localId,
-        };
-      }
-
       it('should replace styleext with style', async () => {
         const workspace = JSON.parse(tree.readContent(workspacePath));
         workspace.schematics = {