message: refactor(upgrade): Drop unused imports
  PR Close
diff: @@ -11,7 +11,7 @@ import {ComponentFactory, ComponentFactoryResolver, Injector, NgZone, Type} from
  import {IAnnotatedFunction, IAttributes, IAugmentedJQuery, ICompileService, IDirective, IInjectorService, INgModelController, IParseService, IScope} from './angular1';
  import {$COMPILE, $INJECTOR, $PARSE, INJECTOR_KEY, LAZY_MODULE_REF, REQUIRE_INJECTOR, REQUIRE_NG_MODEL} from './constants';
  import {DowngradeComponentAdapter} from './downgrade_component_adapter';
  -import {SyncPromise, Thenable, isThenable} from './promise_util';
  +import {SyncPromise, Thenable} from './promise_util';
  import {LazyModuleRef, UpgradeAppType, controllerKey, getDowngradedModuleCount, getTypeName, getUpgradeAppType, validateInjectionKey} from './util';
  