Revert "Update projects/igniteui-angular-elements/src/app/custom-strategy.ts"

This reverts commit 03fdc47.

Author: damyanpetev

projects/igniteui-angular-elements/src/app/custom-strategy.ts

@@ -1,4 +1,4 @@
-import { ApplicationRef, ComponentFactory, ComponentRef, EventEmitter, Injector, Type, ViewContainerRef } from '@angular/core';
+import { ApplicationRef, ComponentFactory, ComponentRef, DestroyRef, EventEmitter, Injector, QueryList, Type, ViewContainerRef, reflectComponentType } from '@angular/core';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { NgElement, NgElementStrategyEvent } from '@angular/elements';
 import { fromEvent, Observable } from 'rxjs';