Summary: Remove .arcconfig
Summary:
Remove .arcconfig

fbshipit-source-id: fe9f000138776a14c507b24c952ecf50b48d71a9

SunguckLee/RocksDB,vmx/rocksdb,Andymic/rocksdb,vmx/rocksdb,Andymic/rocksdb,vmx/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,vmx/rocksdb,SunguckLee/RocksDB,Andymic/rocksdb,SunguckLee/RocksDB,bbiao/rocksdb,bbiao/rocksdb,bbiao/rocksdb,bbiao/rocksdb,bbiao/rocksdb,Andymic/rocksdb,vmx/rocksdb,Andymic/rocksdb,Andymic/rocksdb,bbiao/rocksdb,vmx/rocksdb,SunguckLee/RocksDB,bbiao/rocksdb,SunguckLee/RocksDB,Andymic/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,Andymic/rocksdb,bbiao/rocksdb,SunguckLee/RocksDB