fix: examples wlr-randr scale not work

drm is pending, commit will fail, set scale to become
invalid. do not commit and wait until the next frame to
complete the scaling settings.

Signed-off-by: pengwenhao <pengwenhao@uniontech.com>

Author: pengwenhao

examples/tinywl/Main.qml

@@ -119,13 +119,6 @@ Item {
                             outputDelegate.y = states[i].y
                         }
                     }
-
-                    if (onlyTest) {
-                        ok &= output.test()
-                        output.rollback()
-                    } else {
-                        ok &= output.commit()
-                    }
                 }
                 outputManagerV1.sendResult(config, ok)
             }