Remove empty line.

A copy-paste error.

Signed-off-by: Yuhang Zhao <2546789017@qq.com>

examples/QQPlayer-demo/main.cpp

@@ -43,6 +43,5 @@ int main(int argc, char *argv[]) {
         },
         Qt::QueuedConnection);
     engine.load(mainQmlUrl);
-
     return QGuiApplication::exec();
 }