[mail]: Cleanup muttrc

Remove unused options and obsolete configuration values.

mail/.config/mutt/muttrc

@@ -14,7 +14,6 @@ auto_view text/plain text/html
 alternative_order text/enriched text/plain text/html
 
 set realname="Jens Mathis Sauer"
-# unset use_domain
 set send_charset = "utf-8"
 set header_cache = ~/.cache/mutt
 set message_cachedir = ~/.cache/mutt
@@ -40,13 +39,6 @@ set smime_ca_location = /etc/ssl/certs/ca-certificates.crt
 
 set mail_check = 60
 set timeout = 10
-#set net_inc = 5
-#set time_inc = 15
-
-# set mbox_type = Maildir
-# set folder = ~/mail
-# set timeout = 20
-#
 set pager_stop = yes
 set index_format = "%4C [%Z] %{%b %d} %-15.15L %s"
 set confirmappend = no
@@ -57,25 +49,6 @@ set print_command="muttprint"
 set wait_key = no
 unset folder
 
-
-#mailboxes +gmail/INBOX		\
-#	  +gmail/mbox		\
-#	  +gmail/sent		\
-#	  +gmail/junk		\
-#	  +gmail/LKLM		\
-#	  +gmail/debian-user	\
-#	  +gmail/debian-user-german \
-#	  +gmail/vfio-users	\
-#	  "+------------------"	\
-#	  +uni/INBOX		\
-#	  +uni/archive		\
-#	  +uni/sent		\
-#	  +uni/postponed	\
-#	  +uni/trash		\
-#	  +uni/junk		\
-#	  +uni/studip		\
-#	  +uni/list-kohorte
-
 #
 # Accounts
 #