some cleanup, remove some commented codes

modules/ocl/test/test_gemm.cpp

@@ -53,13 +53,12 @@ PARAM_TEST_CASE(Gemm, int, cv::Size, int)
     int      type;
     cv::Size mat_size;
     int		 flags;
-    //vector<cv::ocl::Info> info;
+
     virtual void SetUp()
     {
         type     = GET_PARAM(0);
         mat_size = GET_PARAM(1);
         flags    = GET_PARAM(2);
-        //cv::ocl::getDevice(info);
     }
 };