Fix tests in files_versions

Author: CarlSchwan

apps/files_versions/tests/Controller/PreviewControllerTest.php

@@ -73,7 +73,6 @@ protected function setUp(): void {
 		$user->expects($this->any())
 			->method('getUID')
 			->willReturn($this->userId);
-		$this->mimeTypeDetector = $this->createMock(IMimeTypeDetector::class);
 		$this->previewManager = $this->createMock(IPreview::class);
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->userSession->expects($this->any())
@@ -86,7 +85,6 @@ protected function setUp(): void {
 			$this->createMock(IRequest::class),
 			$this->rootFolder,
 			$this->userSession,
-			$this->mimeTypeDetector,
 			$this->versionManager,
 			$this->previewManager
 		);