[Author: mmentovai]
[Author: mmentovai]

Fix error-case memory leak in GTMSMJobRemove.

GTMPerformOnLabel will create an error in &local_error when it returns
NULL, so there is no need to create yet another error in local_error.
It masks the error created by GTMPerformOnLabel, which is leaked.

R=dmaclach,thomasvl
APPROVED=thomasvl
DELTA=2  (0 added, 2 deleted, 0 changed)

git-svn-id: 741c308154f1e22deafec9707230e8b816ec4ca6@563 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3

chao787/GTM-mirror,chao787/GTM-mirror,chao787/GTM-mirror