RFD: drop the GH interface.

[Han-Wen Nienhuys]

The GH interface was marked as deprecated in 

commit a0143ebc24c24198e0dfce9b80f3648feb706226
Author: Neil Jerram <[EMAIL PROTECTED]>
Date:   Wed Jun 20 22:08:19 2001 +0000

    * Explain GH deprecation & plan for scm documentation.


Let's really drop it now.
 
-- 
 Han-Wen Nienhuys - [EMAIL PROTECTED] - http://www.xs4all.nl/~hanwen