Remove ability to override default dmenu lines with CLIPMENU_LINES
Remove ability to override default dmenu lines with CLIPMENU_LINES

If people want to use this, they can just pass `-l <n>` to clipmenu and it will
be passed through to dmenu. I've checked that passing `-l` twice works fine and
accepts the second passed `-l` optarg as the definitive one.

myuhe/clipmenu