Vcs: Base VcsClientOptionsPageWidget on Core::IOptionsPageWidget

In preparation of the using the new ICore::IOptionsPage convenience
functions.

Change-Id: Iafe61e287987b3b75758f81bfce7adcdc1d50b64
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/settingspage.cpp

@@ -44,7 +44,7 @@ using namespace VcsBase;
 namespace Git {
 namespace Internal {
 
-SettingsPageWidget::SettingsPageWidget(QWidget *parent) : VcsClientOptionsPageWidget(parent)
+SettingsPageWidget::SettingsPageWidget()
 {
     m_ui.setupUi(this);
     if (Utils::HostOsInfo::isWindowsHost()) {