build: remove unused code from legacy tooling and remove view-engine leftovers (#23899)

* build: remove unused code from legacy tooling and remove viewengine leftovers

Removes unused code from legacy tooling and View Engine compilation
within Bazel.

Also the clang-format file is removed given that we run prettier
in the whole repository now.

* fixup! build: remove unused code from legacy tooling and remove viewengine leftovers

ds

Author: devversion

.clang-format

@@ -18,12 +18,3 @@ config_setting(
     name = "stamp",
     values = {"stamp": "true"},
 )
-
-# This file generates the `angular_ivy_enabled.js` file, which exports a truthy value
-# whether Ivy should be enabled based on the `--defined=angular_ivy_enabled` value
-# so runtime can detect which mode it is running in.
-genrule(
-    name = "angular_ivy_enabled",
-    outs = ["angular_ivy_enabled.js"],
-    cmd = "echo exports.ivyEnabled = \"'True' === '$(angular_ivy_enabled)'\"\\; > $@",
-)

build-config.js

@@ -3,10 +3,14 @@ import * as ts from 'typescript';
 import * as Lint from 'tslint';
 import minimatch from 'minimatch';
 
-const buildConfig = require('../../build-config');
-
 /** License banner that is placed at the top of every public TypeScript file. */
-const licenseBanner = buildConfig.licenseBanner;
+const licenseBanner = `/**
+ * @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
+ */`;
 
 /** Failure message that will be shown if a license banner is missing. */
 const ERROR_MESSAGE =