refactor(@angular/cli): remove v8-profiler typings

Remove dependency to the @types/v8-profiler Profiler type as we don't want to depend on it.

See angular#12411 (comment)

package.json

@@ -87,7 +87,6 @@
     "@types/request": "^2.47.1",
     "@types/semver": "^5.5.0",
     "@types/source-map": "0.5.2",
-    "@types/v8-profiler": "^0.0.5",
     "@types/webpack": "^4.4.11",
     "@types/webpack-dev-server": "^3.1.0",
     "@types/webpack-sources": "^0.1.5",

packages/angular/cli/lib/init.ts

@@ -16,9 +16,6 @@ import { SemVer } from 'semver';
 import { Duplex } from 'stream';
 import { isWarningEnabled } from '../utilities/config';
 
-// from @types/v8-profiler (no dependency to v8-profiler as we use v8-profiler-node8)
-import { Profiler } from 'v8-profiler'; // tslint:disable-line:no-implicit-dependencies
-
 const packageJson = require('../package.json');
 
 function _fromPackageJson(cwd?: string) {
@@ -46,7 +43,10 @@ function _fromPackageJson(cwd?: string) {
 
 // Check if we need to profile this CLI run.
 if (process.env['NG_CLI_PROFILING']) {
-  let profiler: Profiler;
+  let profiler: {
+    startProfiling: (name?: string, recsamples?: boolean) => void;
+    stopProfiling: (name?: string) => any; // tslint:disable-line:no-any
+  };
   try {
     profiler = require('v8-profiler-node8'); // tslint:disable-line:no-implicit-dependencies
   } catch (err) {

yarn.lock

@@ -463,12 +463,6 @@
   version "1.0.1"
   resolved "https://codeload.github.com/quicktype/types-urijs/tar.gz/a23603a04e31e883a92244bff8515e3d841a8b98"
 
-"@types/v8-profiler@^0.0.5":
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/@types/v8-profiler/-/v8-profiler-0.0.5.tgz#2b9f0b7ba3294f5b177b66790607772910a195f9"
-  dependencies:
-    "@types/node" "*"
-
 "@types/webpack-dev-server@^3.1.0":
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/@types/webpack-dev-server/-/webpack-dev-server-3.1.0.tgz#1fae06ad346d2dd09bc5e34745723946458eed58"