Merge pull request #3676 from flx42/leveldb_include_fix

Remove useless LevelDB include

src/caffe/test/test_data_transformer.cpp

@@ -3,7 +3,6 @@
 #include <vector>
 
 #include "gtest/gtest.h"
-#include "leveldb/db.h"
 
 #include "caffe/blob.hpp"
 #include "caffe/common.hpp"