package kit: fix JobQueue::_RemoveDependantJobsOf()

* Delete the right job (the removed dependant job).
* Sever the depencency link between the jobs or the next iteration of
  the loop would process the same job again.

src/kits/package/JobQueue.cpp

@@ -236,7 +236,8 @@ JobQueue::_RemoveDependantJobsOf(BJob* job)
 		} catch (...) {
 		}
 		_RemoveDependantJobsOf(dependantJob);
-		delete job;
+		dependantJob->RemoveDependency(job);
+		delete dependantJob;
 	}
 }