style: tslint enforces no debugger statements left behind (#25532)

PR Close #25532

packages/core/src/di/injectable.ts

@@ -60,10 +60,8 @@ export interface Injectable { providedIn?: Type<any>|'root'|null; }
 * @Annotation
 */
 export const Injectable: InjectableDecorator = makeDecorator(
-    'Injectable', undefined, undefined, undefined, (type: Type<any>, meta: Injectable) => {
-      debugger;
-      return R3_COMPILE_INJECTABLE(type, meta);
-    });
+    'Injectable', undefined, undefined, undefined,
+    (type: Type<any>, meta: Injectable) => R3_COMPILE_INJECTABLE(type, meta));
 
 /**
  * Type representing injectable service.

packages/core/src/render3/assert.ts

@@ -77,6 +77,7 @@ export function assertNgModuleType(
 }
 
 function throwError(msg: string): never {
+  // tslint:disable-next-line
   debugger;  // Left intentionally for better debugger experience.
   throw new Error(`ASSERTION ERROR: ${msg}`);
 }