Vcs/Text search: Remove a few addAutoReleaseObject uses

Using a QObject parent suffices here.

Change-Id: I4dc5448511d55bf14fbd8f810e91336a49e94094
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitgrep.cpp

@@ -218,7 +218,8 @@ static bool isGitDirectory(const QString &path)
     return gitVc == VcsManager::findVersionControlForDirectory(path, 0);
 }
 
-GitGrep::GitGrep()
+GitGrep::GitGrep(QObject *parent)
+    : SearchEngine(parent)
 {
     m_widget = new QWidget;
     auto layout = new QHBoxLayout(m_widget);