Fix build bug caused by PR 6516 (#6535)

Summary:
Fix the build corruption caused by PR https://github.com/facebook/rocksdb/issues/6516

Testing plan: make make asan_check
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6535

Differential Revision: D20448614

Pulled By: zhichao-cao

fbshipit-source-id: 4d2a3dae6cdd781fcfe8e28a84ac3f536db1b067

CMakeLists.txt

@@ -954,7 +954,6 @@ if(WITH_TESTS)
         db/cuckoo_table_db_test.cc
         db/db_basic_test.cc
         db/db_with_timestamp_basic_test.cc
-        db/db_blob_index_test.cc
         db/db_block_cache_test.cc
         db/db_bloom_filter_test.cc
         db/db_compaction_filter_test.cc

src.mk

@@ -317,7 +317,6 @@ MAIN_SOURCES =                                                          \
   db/cuckoo_table_db_test.cc                                            \
   db/db_basic_test.cc                                                   \
   db/db_with_timestamp_basic_test.cc					\
-  db/db_blob_index_test.cc                                              \
   db/db_block_cache_test.cc                                             \
   db/db_bloom_filter_test.cc                                            \
   db/db_compaction_filter_test.cc                                       \