Fix code style and errors

src/covermanager/albumcoverchoicecontroller.cpp

@@ -422,10 +422,7 @@ bool AlbumCoverChoiceController::CanAcceptDrag(const QDragEnterEvent *e) {
     const QString suffix = QFileInfo(url.toLocalFile()).suffix().toLower();
     if (IsKnownImageExtension(suffix)) return true;
   }
-  if (e->mimeData()->hasImage()) {
-    return true;
-  }
-  return false;
+  return e->mimeData()->hasImage();
 
 }