chore(core): Clean up some e2e fixture imports

packages/core/e2e/fixtures/test-plugins/slow-mutation-plugin.ts

@@ -8,8 +8,6 @@ import {
     Product,
     ProductAsset,
     RequestContext,
-    TaxCategory,
-    TaxRate,
     Transaction,
     TransactionalConnection,
     VendurePlugin,

packages/core/e2e/fixtures/test-plugins/with-config.ts

@@ -1,11 +1,5 @@
 import { LanguageCode } from '@vendure/common/lib/generated-types';
-import {
-    ConfigModule,
-    ConfigService,
-    OnVendureBootstrap,
-    OnVendureClose,
-    VendurePlugin,
-} from '@vendure/core';
+import { ConfigModule, VendurePlugin } from '@vendure/core';
 
 @VendurePlugin({
     imports: [ConfigModule],

packages/core/e2e/fixtures/test-plugins/with-global-providers.ts

@@ -11,8 +11,7 @@ import {
     NestInterceptor,
     PipeTransform,
 } from '@nestjs/common';
-import { APP_FILTER, APP_GUARD } from '@nestjs/core';
-import { APP_INTERCEPTOR, APP_PIPE } from '@nestjs/core';
+import { APP_FILTER, APP_GUARD, APP_INTERCEPTOR, APP_PIPE } from '@nestjs/core';
 import { VendurePlugin } from '@vendure/core';
 import { Observable } from 'rxjs';