autofs: media: Don't include nosuid in the script

We already have nosuid option in auto_master so no need to redefine it.
Also it's easier for a user to modify the auto_master configuration file
than the script (which shouldn't be modified).

Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D42492
Reviewed by: rew

(cherry picked from commit 0b7c89c8c236fcfabd1abd59c6b8274c7eb80f5e)