tracing: Remove the useless value assignment in test_create_synth_event()

The value of variable ret is overwritten on the delete branch in the
test_create_synth_event() and we care more about the above error than
this delete portion. Remove it.

Link: https://lkml.kernel.org/r/[email protected]

Reported-by: Tosk Robot <[email protected]>
Signed-off-by: Kaixu Xia <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

kernel/trace/synth_event_gen_test.c

@@ -307,7 +307,7 @@ static int __init test_create_synth_event(void)
 	return ret;
  delete:
 	/* We got an error after creating the event, delete it */
-	ret = synth_event_delete("create_synth_test");
+	synth_event_delete("create_synth_test");
 
 	goto out;
 }