fix: correct ngc lint errors

Author: patrickmichalina

src/modules/http-cache-tag/http-cache-tag-interceptor.service.ts

@@ -1,13 +1,9 @@
 import { Inject, Injectable } from '@angular/core'
 import {
   HttpHandler,
-  HttpHeaderResponse,
   HttpInterceptor,
-  HttpProgressEvent,
   HttpRequest,
-  HttpResponse,
-  HttpSentEvent,
-  HttpUserEvent
+  HttpResponse
 } from '@angular/common/http'
 import {
   CACHE_TAG_CONFIG,
@@ -16,7 +12,6 @@ import {
   CacheTagConfig
 } from './http-cache-tag.server.module'
 import { map } from 'rxjs/operators'
-import { Observable } from 'rxjs'
 
 // tslint:disable:no-class
 // tslint:disable:no-this