remove DB's hacks to work around problems with ncurses' display of

remove DB's hacks to work around problems with ncurses' display of
two-column characters at the beginnings and ends of long lines (i.e,
lines with $'s added), as the problems don't occur with ncurses 5.4, and
there's no easy way to fix the same type of problem with doing a regex
replace of "^" on a line beginning with a two-column character

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2231 35c25a1d-7b9e-4130-9fde-d3aeb78583b8