test-condition: make function return void

We don't look at the result anyway.

src/test/test-condition.c

@@ -113,7 +113,7 @@ static void test_condition_test_path(void) {
         condition_free(condition);
 }
 
-static int test_condition_test_control_group_controller(void) {
+static void test_condition_test_control_group_controller(void) {
         Condition *condition;
         CGroupMask system_mask;
         CGroupController controller;
@@ -123,7 +123,7 @@ static int test_condition_test_control_group_controller(void) {
         r = cg_unified_flush();
         if (r < 0) {
                 log_notice_errno(r, "Skipping ConditionControlGroupController tests: %m");
-                return EXIT_TEST_SKIP;
+                return;
         }
 
         /* Invalid controllers are ignored */
@@ -180,8 +180,6 @@ static int test_condition_test_control_group_controller(void) {
         assert_se(condition);
         assert_se(!condition_test(condition));
         condition_free(condition);
-
-        return EXIT_SUCCESS;
 }
 
 static void test_condition_test_ac_power(void) {