remove stub dojo implementation in scrollable.js because: 1/ that is useless for dojox/app which anyway relies on dojo 2/ that will be removed in dojox/mobile as well
remove stub dojo implementation in scrollable.js because:
1/ that is useless for dojox/app which anyway relies on dojo
2/ that will be removed in dojox/mobile as well

ibm-js/dapp,ibm-js/dapp