~/.muttrc: Remove old label macros.

Either I should start using sup (or turnsole) again or not use them. So
off they go.

.muttrc

# labelling
set index_format="%4C %Z %{%b %d} %-15.15L %?M?(#%03M)&(%4l)?  %?y?[%.20Y] ?%s"
macro index A "<enter-command>set editor=\"~/k/editlabel append\"\n<edit><sync-mailbox><next-undeleted><enter-command>set editor=vim\n" "Append label"
macro index \Ca "<tag-prefix><enter-command>set editor=\"~/k/editlabel append\"\n<edit><sync-mailbox><next-undeleted><tag-prefix><enter-command>set editor=vim\n" "Append label"
macro index E "<enter-command>set editor=\"~/k/editlabel menu\"\n<edit><sync-mailbox><next-undeleted><enter-command>set editor=vim\n" "Edit labels"
# bindings
## edit/move many messages