refactor: remove unused injector

npm/ng-packs/packages/core/src/lib/services/dom-insertion.service.ts

@@ -1,4 +1,4 @@
-import { Injectable, Injector } from '@angular/core';
+import { Injectable } from '@angular/core';
 import { ContentStrategy } from '../strategies/content.strategy';
 import { generateHash } from '../utils';
 
@@ -6,8 +6,6 @@ import { generateHash } from '../utils';
 export class DomInsertionService {
   readonly inserted = new Set<number>();
 
-  constructor(private injector: Injector) {}
-
   insertContent(contentStrategy: ContentStrategy) {
     const hash = generateHash(contentStrategy.content);