Remove the now unused cliutil.

lib/util/cliutil.js

@@ -1,10 +0,0 @@
-module.exports.list = function(val) {
-  return val.split(/\s*,\s*/g).filter(Boolean)
-}
-
-module.exports.size = function(val) {
-  var match = /^(\d+)x(\d+)$/.exec(val)
-  if (match) {
-    return [Number(match[1]), Number(match[2])]
-  }
-}