Removal of unnecessary instanceOf: Scriptable does not have such method and Undefined does not need to override it.
Removal of unnecessary instanceOf: Scriptable does not have such method and Undefined does not need to override it.

tntim96/rhino-jscover,ashwinrayaprolu1984/rhino,sainaen/rhino,jsdoc3/rhino,tntim96/rhino-apigee,tuchida/rhino,InstantWebP2P/rhino-android,lv7777/egit_test,ashwinrayaprolu1984/rhino,ashwinrayaprolu1984/rhino,Angelfirenze/rhino,tejassaoji/RhinoCoarseTainting,tejassaoji/RhinoCoarseTainting,Angelfirenze/rhino,AlexTrotsenko/rhino,Pilarbrist/rhino,AlexTrotsenko/rhino,tejassaoji/RhinoCoarseTainting,sam/htmlunit-rhino-fork,sam/htmlunit-rhino-fork,Angelfirenze/rhino,qhanam/rhino,sainaen/rhino,swannodette/rhino,tejassaoji/RhinoCoarseTainting,tuchida/rhino,lv7777/egit_test,Angelfirenze/rhino,lv7777/egit_test,Angelfirenze/rhino,swannodette/rhino,sainaen/rhino,sainaen/rhino,sam/htmlunit-rhino-fork,Distrotech/rhino,tntim96/rhino-apigee,ashwinrayaprolu1984/rhino,jsdoc3/rhino,qhanam/rhino,tuchida/rhino,qhanam/rhino,AlexTrotsenko/rhino,tejassaoji/RhinoCoarseTainting,swannodette/rhino,lv7777/egit_test,Pilarbrist/rhino,rasmuserik/rhino,AlexTrotsenko/rhino,ashwinrayaprolu1984/rhino,Pilarbrist/rhino,tejassaoji/RhinoCoarseTainting,tejassaoji/RhinoCoarseTainting,swannodette/rhino,swannodette/rhino,InstantWebP2P/rhino-android,sam/htmlunit-rhino-fork,lv7777/egit_test,sam/htmlunit-rhino-fork,swannodette/rhino,tntim96/htmlunit-rhino-fork,swannodette/rhino,AlexTrotsenko/rhino,sainaen/rhino,AlexTrotsenko/rhino,Angelfirenze/rhino,tntim96/rhino-jscover-repackaged,Pilarbrist/rhino,tntim96/htmlunit-rhino-fork,sam/htmlunit-rhino-fork,lv7777/egit_test,Pilarbrist/rhino,sam/htmlunit-rhino-fork,tntim96/rhino-apigee,tuchida/rhino,rasmuserik/rhino,Pilarbrist/rhino,tntim96/rhino-jscover,ashwinrayaprolu1984/rhino,jsdoc3/rhino,lv7777/egit_test,AlexTrotsenko/rhino,ashwinrayaprolu1984/rhino,Pilarbrist/rhino,tntim96/rhino-jscover-repackaged,tuchida/rhino,sainaen/rhino,Angelfirenze/rhino,sainaen/rhino,tuchida/rhino,tuchida/rhino,Distrotech/rhino,qhanam/rhino