Do not report ERROR when sample rate equals 100

unittest/storage/test_partition_incremental_range_spliter.cpp

@@ -29,17 +29,10 @@ namespace storage
 using namespace blocksstable;
 using namespace common;
 
-class ObTenantMetaMemMgr;
-
 void ObCompactionBufferWriter::reset()
 {
 }
 
-int ObTenantMetaMemMgr::fetch_tenant_config()
-{
-  return OB_SUCCESS;
-}
-
 static int get_number(const char *str, const char *&endpos, int64_t &num)
 {
   int ret = OB_SUCCESS;