pending deals can't be removed after canceling the job

[ffteng46]

Describe the bug
A clear and concise description of what the bug is.
After i cancel the queueing job manually, the pending deals from the job are still in the list pow ffs storage -p.
To Reproduce
Steps to reproduce the behavior:

1. Run 'pow ffs storage -p',select a pending cid,then find jobid corresponds to the pending cid using pow ffs log cid.
   run pow ffs cancel jobid,get successful message,Success! Successful cancellation signaling.
2. See error
   pow ffs storage -p |grep cid
   the pending deals are still in the list.
   Expected behavior
   A clear and concise description of what you expected to happen.
   the pending deals will be deleted with removed job
   Screenshots
   If applicable, add screenshots to help explain your problem.
   
   

Version (run lotus version):

pow build info:
Version | git
Git Summary | v0.9.2-2-g5a5c008-dirty
Git Branch | master
Git State | dirty
Git Commit | 5a5c008
Build Date | 2020-10-26T15:01:06Z

powergate server build info:
Version | git
Git Summary | v0.9.2-2-g5a5c008-dirty
Git Branch | master
Git State | dirty
Git Commit | 5a5c008
Build Date | 2020-10-26T15:00:45Z
Additional context
Add any other context about the problem here.