Update app/src/main/java/com/owncloud/android/datamodel/ThumbnailsCacheManager.java

Co-authored-by: Álvaro Brey <alvaro.brey@nextcloud.com>
Signed-off-by: Tobias Kaminsky <tobias@nextcloud.com>

app/src/main/java/com/owncloud/android/datamodel/ThumbnailsCacheManager.java

@@ -312,11 +312,6 @@ public final class ThumbnailsCacheManager {
 
             file = (OCFile) params[0];
 
-//            try {
-//                Thread.sleep(10000);
-//            } catch (InterruptedException e) {
-//                e.printStackTrace();
-//            }
 
             if (file.getRemoteId() != null && file.isPreviewAvailable()) {
                 // Thumbnail in cache?