!14960 clear code warning

From: @wangyanling10
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @wuxuejian

mindspore/ccsrc/backend/kernel_compiler/cpu/bias_add_cpu_kernel.cc

@@ -57,7 +57,7 @@ bool BiasAddCPUKernel::Launch(const std::vector<AddressPtr> &inputs, const std::
         size_t offset = n * c_size * hw_size + c * hw_size;
         size_t hw = 0;
 #ifdef ENABLE_AVX
-        constexpr size_t C8NUM = 8;
+        const size_t C8NUM = 8;
         size_t hw8 = hw_size / C8NUM * C8NUM;
         const float *in_ptr = src_addr + offset;
         float *out_ptr = output_addr + offset;

mindspore/ccsrc/backend/kernel_compiler/cpu/slice_cpu_kernel.cc

@@ -189,11 +189,7 @@ void SliceCPUKernel::CopyDataToOutput(const std::vector<kernel::AddressPtr> &inp
     MS_LOG(EXCEPTION) << id << " output memory out of bounds.";
   }
 
-  size_t buff_size = out_buff_size - out_offset * sizeof(T);
   size_t copy_size = copy_num * sizeof(T);
-  if (buff_size < copy_size) {
-    MS_LOG(EXCEPTION) << "output buffer is not enough. memcpy failed!";
-  }
   auto ret = memcpy_s(output_addr + out_offset, copy_size, input_addr + in_offset, copy_size);
   if (ret != EOK) {
     MS_LOG(EXCEPTION) << "memcpy failed. ret:" << ret;