Remove unused createSeparator function

Removed unused createSeparator function from nmcgeneralsettings.cpp

Author: memurats

src/gui/nmcgui/nmcgeneralsettings.cpp

@@ -19,7 +19,6 @@
 #include <QAbstractButton>
 #include <QCheckBox>
 #include <QCoreApplication>
-#include <QFrame>
 #include <QGroupBox>
 #include <QHBoxLayout>
 #include <QLabel>
@@ -75,14 +74,6 @@ QLabel *createLinkLabel(const QString &text, const QString &url, QWidget *parent
     return label;
 }
 
-QFrame *createSeparator(QWidget *parent)
-{
-    auto *separator = new QFrame(parent);
-    separator->setFrameShape(QFrame::HLine);
-    separator->setFrameShadow(QFrame::Plain);
-    return separator;
-}
-
 } // namespace
 
 NMCGeneralSettings::NMCGeneralSettings(QWidget *parent)