diff --git a/src/plugins/texteditor/basetexteditor.cpp b/src/plugins/texteditor/basetexteditor.cpp
index f1098c6a232..1179561bce9 100644
--- a/src/plugins/texteditor/basetexteditor.cpp
+++ b/src/plugins/texteditor/basetexteditor.cpp
@@ -131,16 +131,6 @@
 using namespace Core;
 using namespace Utils;
 
-static QString QString_toUpper(const QString &str)
-{
-    return str.toUpper();
-}
-
-static QString QString_toLower(const QString &str)
-{
-    return str.toLower();
-}
-
 namespace TextEditor {
 namespace Internal {