rm many unused fcts, detected with xunused

detected using xunused (described in Developer's corner).

GUI/View/Widget/ApplicationSettings.cpp

@@ -17,7 +17,6 @@
 #include <QApplication>
 #include <QFile>
 #include <QSettings>
-#include <QStandardPaths>
 #include <QStyle>
 
 namespace {
@@ -27,7 +26,6 @@ const QString S_STYLE = "UiStyle";
 const QString S_SIZE = "Size";
 const QString S_POS = "Pos";
 const QString S_SINGLE_SAMPLE_MODE = "SingleSampleMode";
-const QString S_DEFAULT_UNIT_IS_ANGSTROM = "DefaultUnitIsAngstrom";
 
 } // namespace
 
@@ -68,16 +66,6 @@ void ApplicationSettings::setStyleToUse(Style style)
     QSettings().setValue(S_STYLE, static_cast<int>(style));
 }
 
-bool ApplicationSettings::defaultUnitIsAngstrom() const
-{
-    return QSettings().value(S_DEFAULT_UNIT_IS_ANGSTROM, false).toBool();
-}
-
-void ApplicationSettings::setDefaultUnitIsAngstrom(bool b) const
-{
-    QSettings().setValue(S_DEFAULT_UNIT_IS_ANGSTROM, b);
-}
-
 void ApplicationSettings::saveWindowSizeAndPos(const QWidget* w)
 {
     ASSERT(!w->objectName().isEmpty());