Implement remove for update-clause

[Google Code Exporter]

Currently it is not possible to remove certain constructs, e.g. types or 
themes, from other construct. Therefore it would be nice if the update-clause 
could be improved to support remove statements.

For examle: 

UPDATE x REMOVE y WHERE z
with x = types | supertypes | scope | locators | item | indicators

Original issue reported on code.google.com by [e-mail] on 15 Feb 2011 at 8:10

[Google Code Exporter]

Original comment by [e-mail] on 15 Feb 2011 at 11:17

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[Google Code Exporter]

Original comment by [e-mail] on 16 Feb 2011 at 11:26

• Changed state: Fixed