Remove unused code in samplerlessReads (#1051)

These declarations either aren't used or aren't needed, as testBase.h
already declares them.

Signed-off-by: Radek Szymanski <radek.szymanski@arm.com>

test_conformance/images/samplerlessReads/main.cpp

@@ -13,17 +13,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-#include "../harness/compat.h"
 
 #include <stdio.h>
 #include <string.h>
-
-#if !defined(_WIN32)
-#include <unistd.h>
-#include <sys/time.h>
-#endif
-
 #include "../testBase.h"
+#include "../harness/compat.h"
 #include "../harness/fpcontrol.h"
 #include "../harness/parseParameters.h"
 
@@ -44,8 +38,6 @@ cl_channel_order    gChannelOrderToUse = (cl_channel_order)-1;
 bool                gEnablePitch = false;
 bool                gDeviceLt20 = false;
 
-#define MAX_ALLOWED_STD_DEVIATION_IN_MB        8.0
-
 static void printUsage( const char *execName );
 
 extern int test_image_set( cl_device_id device, cl_context context, cl_command_queue queue, cl_mem_object_type imageType );