Remove appending of --+

For some reason this tamper script automatically adds --+ in some cases. Unless I'm mistaken, normally this is something that should be handled by the different payloads (payloads.xml). I have found cases where using this script failed because it would add --+ even though the payload was trying to use #, and the application in question was blacklisting on --. Removing these lines allowed the script to work and payloads using either -- or # should work as normal.

Is there some particular reason for wanting to auto-add --+ within this tamper script?