No need add ut.

tests/ut/ge/graph/manager/graph_caching_allocator_unittest.cc

@@ -58,7 +58,6 @@ TEST_F(UtestGraphCachingAllocatorTest, malloc_success) {
   EXPECT_EQ(MemManager::Instance().Initialize(mem_type), SUCCESS);
   uint8_t *ptr = MemManager::Instance().CachingInstance(RT_MEMORY_HBM).Malloc(kMByteSize);
   EXPECT_NE(nullptr, ptr);
-  MemManager::Instance().CachingInstance(RT_MEMORY_HBM).TryFreeBlocks();
   MemManager::Instance().Finalize();
 }