!14529 fix codex warning in somas

From: @laiyongqiang
Reviewed-by: @zhoufeng54,@jjfeing
Signed-off-by: @jjfeing

mindspore/ccsrc/backend/optimizer/somas/somas.cc

@@ -225,7 +225,7 @@ bool Somas::LoadSomasResult(const session::KernelGraph *graph, const string file
   } catch (std::exception &e) {
     MS_LOG(WARNING) << "Parse json file error: " << filename << ", sleep 500ms and retry again.";
     somas_json_fs.close();
-    usleep(500000);
+    std::this_thread::sleep_for(std::chrono::milliseconds(500));
     std::ifstream retry_tmp(filename);
     if (!retry_tmp.is_open()) {
       MS_LOG(INFO) << "Open json file: " << filename << " error, please check kernel_meta.";

mindspore/ccsrc/backend/optimizer/somas/somas.h

@@ -56,7 +56,6 @@ class Somas {
 
   static bool NodeSort(SomasNodePtr, SomasNodePtr);
   std::vector<DynamicBitSet> reuse_matrix_;
-  std::vector<DynamicBitSet> tensor_relation;
   void ConvertToProfilingNode(uint32_t graph_id);
 
  private:

mindspore/ccsrc/backend/optimizer/somas/somas_solver_pre.h

@@ -90,6 +90,8 @@ class DynamicBitSet {
     Reset(0x0);
   }
 
+  ~DynamicBitSet() = default;
+
   void SetBitTrue(size_t index, bool log = false) {
     if (log) {
       MS_LOG(INFO) << GetIndex(index) << " " << GetBitMask(index);