Stop transferor module

[sharad1126]

Impact of the new feature
With the WMCore MS transfer, we don't need transferor to run anymore.

Is your feature request related to a problem? Please describe.
Stepchain workflows were still considered by transferor but #549 should solve this.

Describe the solution you'd like
Stop transferor module:
[1] https://github.com/CMSCompOps/WmAgentScripts/blob/master/precycle.sh

[2] https://github.com/CMSCompOps/WmAgentScripts/blob/master/acrontab.list#L18

Additional context
@z4027163 @amaltaro fyi