refactor: cleanup code

diyac.c

@@ -67,7 +67,7 @@ int main(int argc, char *argv[])
             exit_with_session = 1;
             break;
         default:
-            printf("Usage: %s [-s] startup command]\n", argv[0]);
+            help();
             return 0;
         }
     }

seat.c

@@ -96,7 +96,7 @@ static void keyboard_handle_key(
     struct wlr_seat *seat = keyboard->input.seat->wlr_seat;
 
     /* Translate libinput keycode -> xkbcommon */
-    wlr_log(WLR_INFO, "receive keycode %d", event->keycode);
+    // wlr_log(WLR_INFO, "receive keycode %d", event->keycode);
     uint32_t keycode = event->keycode + 8;
     /* Get a list of keysyms based on the keymap for this keyboard */
     const xkb_keysym_t *syms;