fix: reverted adding withHttpBackend

the new function practically saves the user 4 characters while
adding a new function to the library with no practical use.

~~~
TranslateHttpLoader.withHttpBackend(httpBackend, '/assets/i18n/', '.json'),
~~~

vs

~~~
new TranslateHttpLoader(new HttpClient(httpBackend), '/assets/i18n/', '.json'),
~~~

It makes more sense to add this to the documentation.

Author: CodeAndWeb

projects/http-loader/src/lib/http-loader-backend.spec.ts

@@ -1,6 +1,6 @@
 import {
   HTTP_INTERCEPTORS,
-  HttpBackend,
+  HttpBackend, HttpClient,
   provideHttpClient,
   withInterceptorsFromDi
 } from "@angular/common/http";
@@ -32,7 +32,7 @@ describe('TranslateLoader (HttpBackend)', () => {
           loader: {
             provide: TranslateLoader,
             useFactory: (httpBackend: HttpBackend) =>
-              TranslateHttpLoader.withHttpBackend(httpBackend, '/assets/i18n/', '.json'),
+              new TranslateHttpLoader(new HttpClient(httpBackend), '/assets/i18n/', '.json'),
             deps: [HttpBackend],
           }
         }),

projects/http-loader/src/lib/http-loader.ts

@@ -1,5 +1,5 @@
 import {TranslateLoader, TranslationObject} from "@ngx-translate/core";
-import {HttpBackend, HttpClient} from "@angular/common/http";
+import {HttpClient} from "@angular/common/http";
 import {Inject, Injectable} from "@angular/core";
 import {Observable} from 'rxjs';
 
@@ -16,15 +16,6 @@ export class TranslateHttpLoader implements TranslateLoader {
   )
   {}
 
-  public static withHttpBackend(
-    backend: HttpBackend,
-    prefix: string = TranslateHttpLoader.defaultPrefix,
-    suffix: string = TranslateHttpLoader.defaultSuffix
-  ): TranslateHttpLoader
-  {
-    return new TranslateHttpLoader(new HttpClient(backend), prefix, suffix);
-  }
-
   /**
    * Gets the translations from the server
    */