simplify non-instruction blocks
simplify non-instruction blocks

Reviewed By: justinjhendrick

Differential Revision: D14538003

fbshipit-source-id: f39605fd66cbcbb5b5431a14083ac1dec7be06e3

facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex,facebook/redex