Update meta2d.js
Update meta2d.js

removed onup ondown duplicates
tenjou/meta2d,InfiniteFoundation/meta,InfiniteFoundation/meta2d,InfiniteFoundation/meta2d,InfiniteFoundation/meta,InfiniteFoundation/meta2d,InfiniteFoundation/meta2d,InfiniteFoundation/meta,InfiniteFoundation/meta