!15318 Fix CodeDex warnings

From: @zyli2020
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

mindspore/ccsrc/ps/ps_cache/ps_cache_manager.cc

@@ -222,8 +222,9 @@ void PsCacheManager::AllocMemForHashTable() {
     device_address.addr = addr;
 
     auto &host_address = item.second.host_address;
-    host_address =
-      std::shared_ptr<float[]>(new float[host_vocab_cache_size_ * embedding_size], std::default_delete<float[]>());
+    std::unique_ptr<float[]> host_hash_table_addr = std::make_unique<float[]>(host_vocab_cache_size_ * embedding_size);
+    MS_EXCEPTION_IF_NULL(host_hash_table_addr);
+    host_address = std::move(host_hash_table_addr);
     MS_EXCEPTION_IF_NULL(host_address);
 
     max_embedding_size = (embedding_size > max_embedding_size) ? embedding_size : max_embedding_size;