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/pipes/main.cpp

@@ -103,6 +103,6 @@ test_definition test_list[] = {
 const int test_num = ARRAY_SIZE(test_list);
 
 int main(int argc, const char *argv[]) {
-  return runTestHarnessWithCheck(argc, argv, test_num, test_list, false, false,
+  return runTestHarnessWithCheck(argc, argv, test_num, test_list, false,
                                  0, InitCL);
 }