remove unnecessary prototype monkeying in setup/teardown
remove unnecessary prototype monkeying in setup/teardown

hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,startxfr/jquery-mobile,hinaloe/jqm-demo-ja,hinaloe/jqm-demo-ja,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,startxfr/jquery-mobile,startxfr/jquery-mobile