Revoke on collections

Hi All,

I created collection GMRTSUCOL1 using below command:

SET CURRENT SQLID = 'ZZGC83';
GRANT CREATE ON COLLECTION GMRTSUCOL1 TO GMRTSU
;


Now i want to drop the collection GMRTSUCOL1, Can u please tell me the command?

DB2 VERSION : V8R1M0

Regards
Suman