Drop KDigitalValidator class, hasn't been used by anything in a long time

src/kftabdlg.cpp

@@ -54,9 +54,6 @@ struct MimeTypes
 KfindTabWidget::KfindTabWidget(QWidget *parent)
     : QTabWidget(parent)
 {
-    // This validator will be used for all numeric edit fields
-    //KDigitValidator *digitV = new KDigitValidator(this);
-
     // ************ Page One ************
 
     pages[0] = new QWidget;
@@ -833,31 +830,6 @@ void KfindTabWidget::slotUpdateByteComboBox(int value)
     sizeUnitBox->setItemText(0, i18np("Byte", "Bytes", value));
 }
 
-/**
-   Digit validator. Allows only digits to be typed.
-**/
-KDigitValidator::KDigitValidator(QWidget *parent)
-    : QValidator(parent)
-{
-    r = new QRegExp(QStringLiteral("^[0-9]*$"));
-}
-
-KDigitValidator::~KDigitValidator()
-{
-    delete r;
-}
-
-QValidator::State KDigitValidator::validate(QString &input, int &) const
-{
-    if (r->indexIn(input) < 0) {
-        // Beep on user if he enters non-digit
-        QApplication::beep();
-        return QValidator::Invalid;
-    } else {
-        return QValidator::Acceptable;
-    }
-}
-
 //*******************************************************
 //             Static utility functions
 //*******************************************************

src/kftabdlg.h

@@ -11,7 +11,6 @@
 #include <QMimeType>
 #include <QTabWidget>
 #include <QUrl>
-#include <QValidator> // for KDigitValidator
 
 class KUrlComboBox;
 class QButtonGroup;
@@ -21,7 +20,6 @@ class QCheckBox;
 class KLineEdit;
 class QString;
 class QDate;
-class QRegExp;
 class KDateComboBox;
 class KComboBox;
 class QSpinBox;
@@ -119,18 +117,4 @@ private:
     QStringList m_AudioTypes;
 };
 
-class KDigitValidator : public QValidator
-{
-    Q_OBJECT
-
-public:
-    explicit KDigitValidator(QWidget *parent);
-    ~KDigitValidator();
-
-    QValidator::State validate(QString &input, int &) const override;
-
-private:
-    QRegExp *r;
-};
-
 #endif