Remove unused parameter (#630)

The imageSupportRequired param is not needed in runTestHarnessWithCheck,
so just remove it.

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

test_conformance/device_execution/main.cpp

@@ -96,5 +96,5 @@ int main(int argc, const char *argv[])
       }
     }
 
-    return runTestHarnessWithCheck(argc, argv, test_num, test_list, false, false, 0, InitCL);
+    return runTestHarnessWithCheck(argc, argv, test_num, test_list, false, 0, InitCL);
 }