remove redundant mutex

paddle/cuda/src/hl_cuda_cublas.cc

@@ -14,7 +14,6 @@ limitations under the License. */
 
 #include "hl_cuda_cublas.h"
 #include <sys/time.h>
-#include <mutex>
 #include "hl_cuda.h"
 #include "hl_thread.ph"
 #include "paddle/utils/DynamicLoad.h"

paddle/cuda/src/hl_cuda_cudnn.cc

@@ -15,7 +15,6 @@ limitations under the License. */
 #include "hl_cuda_cudnn.h"
 #include <cudnn.h>
 #include <gflags/gflags.h>
-#include <mutex>
 #include "hl_cuda_cudnn.ph"
 #include "hl_thread.ph"
 #include "paddle/utils/DynamicLoad.h"

paddle/cuda/src/hl_cuda_device.cc

@@ -21,7 +21,6 @@ limitations under the License. */
 #include <sys/syscall.h>
 #include <sys/time.h>
 #include <unistd.h>
-#include <mutex>
 #include "hl_cuda.ph"
 #include "hl_thread.ph"
 #include "paddle/utils/Logging.h"