[LyX/2.3.x] rawName() is only used with Qt4.

[Jean-Marc Lasgouttes]

commit 847312daea54fc703b0c679ef3b02797b55d10ba
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Sat Mar 13 21:57:18 2021 +0100

    rawName() is only used with Qt4.
    
    Fixes warning:
    ../../../../stable/src/frontends/qt4/GuiFontLoader.cpp:132:9: warning: ‘QString lyx::frontend::{anonymous}::rawName(const QString&)’ defined but not used [-Wunused-function]
      132 | QString rawName(QString const & family)
          |         ^~~~~~~
---
 src/frontends/qt4/GuiFontLoader.cpp |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/frontends/qt4/GuiFontLoader.cpp b/src/frontends/qt4/GuiFontLoader.cpp
index 130e5b9..caa531c 100644
--- a/src/frontends/qt4/GuiFontLoader.cpp
+++ b/src/frontends/qt4/GuiFontLoader.cpp
@@ -129,6 +129,7 @@ GuiFontInfo & fontinfo(FontInfo const & f)
 }
 
 
+#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
 QString rawName(QString const & family)
 {
 	for (size_t i = 0; i < nr_symbol_fonts; ++i)
@@ -138,6 +139,7 @@ QString rawName(QString const & family)
 	LYXERR(Debug::FONT, "BUG: family not found !");
 	return QString();
 }
+#endif
 
 
 QString symbolFamily(FontFamily family)