Remove method Text._calc_line_translation()
Remove method Text._calc_line_translation()

_calc_line_translation() is extremely simple and only used in one place.

tonycpsu/urwid,inducer/urwid,urwid/urwid,wardi/urwid,urwid/urwid,inducer/urwid,tonycpsu/urwid,tonycpsu/urwid,rndusr/urwid,wardi/urwid,rndusr/urwid,urwid/urwid,rndusr/urwid,wardi/urwid,inducer/urwid