remove unused code

src/main/java/com/owncloud/android/datamodel/MediaProvider.java

@@ -131,8 +131,6 @@ public class MediaProvider {
                         if (filePath != null) {
                             mediaFolder.filePaths.add(filePath);
                             mediaFolder.absolutePath = filePath.substring(0, filePath.lastIndexOf("/"));
-                        } else {
-                            failedImages++;
                         }
                     }
                     cursorImages.close();