diff --git a/src/plugins/beautifier/configurationdialog.cpp b/src/plugins/beautifier/configurationdialog.cpp
index 9d3cf5f5cc8..9f37fe5225b 100644
--- a/src/plugins/beautifier/configurationdialog.cpp
+++ b/src/plugins/beautifier/configurationdialog.cpp
@@ -114,14 +114,6 @@ void ConfigurationDialog::setSettings(AbstractSettings *settings)
     m_editor->setSettings(m_settings);
 }
 
-void ConfigurationDialog::clear()
-{
-    m_name->clear();
-    m_editor->clear();
-    m_currentKey.clear();
-    updateOkButton();
-}
-
 QString ConfigurationDialog::key() const
 {
     return m_name->text().simplified();
diff --git a/src/plugins/beautifier/configurationdialog.h b/src/plugins/beautifier/configurationdialog.h
index 417541fbd95..f739154a3ad 100644
--- a/src/plugins/beautifier/configurationdialog.h
+++ b/src/plugins/beautifier/configurationdialog.h
@@ -24,7 +24,6 @@ public:
     ~ConfigurationDialog() override;
     void setSettings(AbstractSettings *settings);
 
-    void clear();
     QString key() const;
     void setKey(const QString &key);
     QString value() const;
diff --git a/src/plugins/beautifier/configurationeditor.cpp b/src/plugins/beautifier/configurationeditor.cpp
index 1a365dc4e7c..6d244a6544b 100644
--- a/src/plugins/beautifier/configurationeditor.cpp
+++ b/src/plugins/beautifier/configurationeditor.cpp
@@ -22,8 +22,6 @@ ConfigurationSyntaxHighlighter::ConfigurationSyntaxHighlighter(QTextDocument *pa
     const TextEditor::FontSettings fs = TextEditor::TextEditorSettings::fontSettings();
     m_formatKeyword = fs.toTextCharFormat(TextEditor::C_FIELD);
     m_formatComment = fs.toTextCharFormat(TextEditor::C_COMMENT);
-
-    m_expressionComment.setPattern("#[^\\n]*");
 }
 
 void ConfigurationSyntaxHighlighter::setKeywords(const QStringList &keywords)
@@ -41,11 +39,6 @@ void ConfigurationSyntaxHighlighter::setKeywords(const QStringList &keywords)
     m_expressionKeyword.setPattern("(?:\\s|^)(" + pattern.join('|') + ")(?=\\s|\\:|\\=|\\,|$)");
 }
 
-void ConfigurationSyntaxHighlighter::setCommentExpression(const QRegularExpression &rx)
-{
-    m_expressionComment = rx;
-}
-
 void ConfigurationSyntaxHighlighter::highlightBlock(const QString &text)
 {
     QRegularExpressionMatchIterator it = m_expressionKeyword.globalMatch(text);
@@ -54,7 +47,8 @@ void ConfigurationSyntaxHighlighter::highlightBlock(const QString &text)
         setFormat(match.capturedStart(), match.capturedLength(), m_formatKeyword);
     }
 
-    it = m_expressionComment.globalMatch(text);
+    static const QRegularExpression expressionComment("#[^\\n]*");
+    it = expressionComment.globalMatch(text);
     while (it.hasNext()) {
         const QRegularExpressionMatch match = it.next();
         setFormat(match.capturedStart(), match.capturedLength(), m_formatComment);
@@ -93,11 +87,6 @@ void ConfigurationEditor::setSettings(AbstractSettings *settings)
     m_model->setStringList(keywords);
 }
 
-void ConfigurationEditor::setCommentExpression(const QRegularExpression &rx)
-{
-    m_highlighter->setCommentExpression(rx);
-}
-
 // Workaround for handling "ESC" right when popup is shown.
 bool ConfigurationEditor::eventFilter(QObject *object, QEvent *event)
 {
diff --git a/src/plugins/beautifier/configurationeditor.h b/src/plugins/beautifier/configurationeditor.h
index 35b21d72866..03571fd7b93 100644
--- a/src/plugins/beautifier/configurationeditor.h
+++ b/src/plugins/beautifier/configurationeditor.h
@@ -25,14 +25,12 @@ class ConfigurationSyntaxHighlighter : public QSyntaxHighlighter
 public:
     explicit ConfigurationSyntaxHighlighter(QTextDocument *parent);
     void setKeywords(const QStringList &keywords);
-    void setCommentExpression(const QRegularExpression &rx);
 
 protected:
     void highlightBlock(const QString &text) override;
 
 private:
     QRegularExpression m_expressionKeyword;
-    QRegularExpression m_expressionComment;
     QTextCharFormat m_formatKeyword;
     QTextCharFormat m_formatComment;
 };
@@ -44,7 +42,6 @@ class ConfigurationEditor : public QPlainTextEdit
 public:
     explicit ConfigurationEditor(QWidget *parent = nullptr);
     void setSettings(AbstractSettings *settings);
-    void setCommentExpression(const QRegularExpression &rx);
 
 protected:
     bool eventFilter(QObject *object, QEvent *event) override;