chore(lint): remove unused imports (#11923)

This was done automatically by tslint, which can now fix issues it finds.
The fixer is still pending in PR https://github.com/palantir/tslint/pull/1568
Also I have a local bugfix for https://github.com/palantir/tslint/issues/1569
which causes too many imports to be deleted.

modules/@angular/compiler/src/view_compiler/compile_query.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {CompileQueryMetadata, CompileTokenMetadata} from '../compile_metadata';
+import {CompileQueryMetadata} from '../compile_metadata';
 import {ListWrapper} from '../facade/collection';
 import {isBlank, isPresent} from '../facade/lang';
 import {Identifiers, resolveIdentifier} from '../identifiers';