CHART-17775 删除无用方法

designer-base/src/main/java/com/fr/design/gui/ispinner/chart/UISpinnerWithUnit.java

@@ -23,9 +23,4 @@ public class UISpinnerWithUnit extends UISpinner {
     protected UINumberField initNumberField() {
         return new UINumberFieldWithUnit(3, unit);
     }
-
-    @Override
-    public UINumberFieldWithUnit getTextField() {
-        return (UINumberFieldWithUnit) super.getTextField();
-    }
 }