mail/mutt: Remove feature patches

[dereks_lifeofadishwasher.com]

Summary

• As mentioned in efe2cf37e6 UPDATING and pkg-message to keep mail/mutt inline with upstream removing addtional ports patches.
• Update post-install sed to be more vim make.vim syntax friendly. It is making any # a make comments.

Test Plan

portlint, portclippy, portfmt: all good.
poudriere testport with default and no options (or smallest amount): Good.
install/test: Running mutt-2.2.10_3 for ~5 days without issue.