Deleting codes
You can delete codes from an imported code source by creating a text file containing the list of codes to be deleted. Each code must be defined in a new line and use the following format:
code1
code2
To delete codes from an imported code source
1. Click View on the left pane of the Code Sources page.
The View page with a list of imported code sources is displayed on the right pane.
2. On the View page, click the icon 
under the Action column of a code source. The Custom page is displayed in the browser window which contains a Browse and a Delete button.
3. Click Browse to navigate to the file that contains the codes to be deleted.
4. Click Delete.
Note:
The module ignores codes that are present in the text file but not in the imported code source.