chore: remove unused imports and fix lint errors

   - Remove unused imports across library and test files
   - Convert empty interface to type alias in translate.providers.ts
   - Replace  types with proper type assertions

Author: CodeAndWeb

projects/ngx-translate/src/lib/translate.module.ts

@@ -1,18 +1,7 @@
-import { ModuleWithProviders, NgModule } from "@angular/core";
-import { DefaultMissingTranslationHandler } from "./missing-translation-handler";
-import { TranslateNoOpCompiler } from "./translate.compiler";
+import { NgModule } from "@angular/core";
 import { TranslateDirective } from "./translate.directive";
-import { TranslateNoOpLoader } from "./translate.loader";
-import { TranslateDefaultParser } from "./translate.parser";
 import { TranslatePipe } from "./translate.pipe";
-import {
-    defaultProviders,
-    provideMissingTranslationHandler,
-    provideTranslateCompiler,
-    provideTranslateLoader,
-    provideTranslateParser,
-    TranslateProviders,
-} from "./translate.providers";
+import { TranslateProviders } from "./translate.providers";
 
 import { Language } from "./translate.service.interface";
 

projects/ngx-translate/src/lib/translate.providers.ts

@@ -1,4 +1,4 @@
-import { ClassProvider, inject, InjectionToken, Provider, Type } from "@angular/core";
+import { ClassProvider, Provider, Type } from "@angular/core";
 import {
     DefaultMissingTranslationHandler,
     MissingTranslationHandler,
@@ -21,7 +21,7 @@ export interface TranslateProviders {
     missingTranslationHandler?: Provider;
 }
 
-export interface ChildTranslateServiceConfig extends Partial<TranslateProviders> { }
+export type ChildTranslateServiceConfig = Partial<TranslateProviders>;
 
 export interface RootTranslateServiceConfig extends ChildTranslateServiceConfig {
     fallbackLang?: Language;

projects/ngx-translate/src/lib/translate.service.ts

@@ -1,6 +1,5 @@
 import {
     computed,
-    DestroyRef,
     inject,
     Injectable,
     InjectionToken,
@@ -317,7 +316,7 @@ export class TranslateService implements ITranslateService {
     }
 
     public getCurrentLang(): Language {
-        return this.isRoot ? this._currentLang : (this.parent?.getCurrentLang() ?? (undefined as any));
+        return this.isRoot ? this._currentLang : (this.parent?.getCurrentLang() ?? (undefined as unknown as Language));
     }
 
     protected loadAndCompileTranslations(

projects/ngx-translate/src/lib/translate.store.ts

@@ -2,10 +2,8 @@ import { Injectable } from "@angular/core";
 import { Observable, Subject } from "rxjs";
 import { getValue, mergeDeep } from "./util";
 import {
-    FallbackLangChangeEvent,
     InterpolatableTranslation,
     InterpolatableTranslationObject,
-    LangChangeEvent,
     Language,
     TranslationChangeEvent,
 } from "./translate.service.interface";

projects/ngx-translate/src/tests/translate.hierarchy.spec.ts

@@ -1,9 +1,7 @@
 import { Injector } from "@angular/core";
-import { TestBed } from "@angular/core/testing";
 import { Observable, of } from "rxjs";
 import {
     provideChildTranslateService,
-    provideTranslateLoader,
     provideTranslateService,
     TranslateLoader,
     TranslateService,

projects/ngx-translate/src/tests/translate.service.spec.ts

@@ -1,4 +1,4 @@
-import { Component, inject, signal, Signal, computed } from "@angular/core";
+import { Component, inject, signal, computed } from "@angular/core";
 import { fakeAsync, TestBed, tick } from "@angular/core/testing";
 import { defer, EMPTY, Observable, of, timer, zip } from "rxjs";
 import { first, map, take, toArray } from "rxjs/operators";
@@ -9,7 +9,6 @@ import {
     provideTranslateLoader,
     provideTranslateService,
     TranslateLoader,
-    TranslateModule,
     TranslatePipe,
     TranslateService,
     Translation,

projects/ngx-translate/src/tests/translate.store.spec.ts

@@ -2,8 +2,8 @@ import { Location } from "@angular/common";
 import {
     Component,
     inject as coreInject,
-    ModuleWithProviders,
     NgModule,
+    Provider,
     Type,
 } from "@angular/core";
 import { ComponentFixture, fakeAsync, TestBed, tick, inject } from "@angular/core/testing";
@@ -40,7 +40,7 @@ class RootComponent {
 })
 class ParentLazyLoadedComponent { }
 
-function getLazyLoadedModule(providers: any[] = []) {
+function getLazyLoadedModule(providers: Provider[] = []) {
     // eslint-disable-next-line @angular-eslint/prefer-standalone
     @Component({ selector: "app-lazy", template: "lazy-loaded-child", standalone: false })
     class ChildLazyLoadedComponent {