Remove obsolete www_hist menu

dotfiles/config/bmo/menu.ini

     selector_args = -l 20 --split =
     consumer    = bmo wish -f
 
-[menu.def.www_hist]
-    generator   = tac .local/share/uzbl/history | uniq
-    selector_args = -l 20 --split-field 3
-    consumer    = bmo wish -f
-
 [menu.def.home]
     generator   = ls -1 -t
     selector_args = -l 30