Remove cuckoo hash memtable (#4953)

Summary:
Cuckoo Hash is less useful than we initially expected. Remove it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4953

Differential Revision: D13979264

Pulled By: siying

fbshipit-source-id: 2a60afdaa989f045357398b43a1cc5d46f4492ed

1 files changed, 0 insertions, 1 deletions

diff --git a/src.mk b/src.mk
index 5cc599fda..034459600 100644
--- a/src.mk
+++ b/src.mk
@@ -66,7 +66,6 @@ LIB_SOURCES =                                                   \
   env/io_posix.cc                                               \
   env/mock_env.cc                                               \
   memtable/alloc_tracker.cc                                     \
-  memtable/hash_cuckoo_rep.cc                                   \
   memtable/hash_linklist_rep.cc                                 \
   memtable/hash_skiplist_rep.cc                                 \
   memtable/skiplistrep.cc                                       \