Gui: [skip ci] use string version of QTextStream::setCodec

src/Gui/EditorView.cpp

@@ -37,9 +37,6 @@
 # include <QPrintPreviewDialog>
 # include <QSpacerItem>
 # include <QStyle>
-# if QT_VERSION < 0x060000
-# include <QTextCodec>
-# endif
 # include <QTextCursor>
 # include <QTextDocument>
 # include <QTextStream>
@@ -526,7 +523,7 @@ bool EditorView::saveFile()
         return false;
     QTextStream ts(&file);
 #if QT_VERSION < 0x060000
-    ts.setCodec(QTextCodec::codecForName("UTF-8"));
+    ts.setCodec("UTF-8");
 #endif
     ts << d->textEdit->document()->toPlainText();
     file.close();