lang: removing mix.js as obsolete superceded by dojox.lang.oo, !strict.
lang: removing mix.js as obsolete superceded by dojox.lang.oo, !strict.

git-svn-id: ee6e786acc44c9cca5ee17c71a5576c45c210361@17114 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful