You can quickly remove a tab stop using the horizontal ruler or the Text inspector.
To delete a tab stop, drag the tab off the horizontal ruler.
If the horizontal ruler is hidden, click View in the toolbar and choose Show Rulers.
To delete a tab stop using the Text inspector, click Inspector in the toolbar, click the Text button, and then click Tabs. Select the tab stop you want to delete in the Tab Stops column, and then click the Delete (–) button.