[vcs] remove unused methods, cleanup

platform/vcs-impl/src/com/intellij/openapi/vcs/configurable/VcsDirectoryConfigurationPanel.java

@@ -195,7 +195,7 @@ public class VcsDirectoryConfigurationPanel extends JPanel implements Configurab
 
       @Override
       public int getAdditionalWidth() {
-        return UIUtil.DEFAULT_HGAP;
+        return DEFAULT_HGAP;
       }
     };
 
@@ -297,14 +297,6 @@ public class VcsDirectoryConfigurationPanel extends JPanel implements Configurab
     return new DefaultComboBoxModel(result);
   }
 
-  protected String getLabelText() {
-    return null;
-  }
-
-  protected JButton[] createButtons() {
-    return new JButton[]{};
-  }
-
   private void addMapping() {
     VcsMappingConfigurationDialog dlg = new VcsMappingConfigurationDialog(myProject, VcsBundle.message("directory.mapping.add.title"));
     // due to wonderful UI designer bug