remove dead assignments
remove dead assignments

Summary: WIP

Reviewed By: mroch

Differential Revision: D5756103

fbshipit-source-id: 7b3cef14b8719e53ce6e50817de075f24d108e61

AgentME/flow,gabelevi/flow,AgentME/flow,gabelevi/flow,mroch/flow,jamesgpearce/flow,samwgoldman/flow,claudiopro/flow,samwgoldman/flow,facebook/flow,facebook/flow,AgentME/flow,popham/flow,TiddoLangerak/flow,popham/flow,mroch/flow,ylu1317/flow,JonathanUsername/flow,ylu1317/flow,nmote/flow,jamesgpearce/flow,nmote/flow,claudiopro/flow,nmote/flow,samwgoldman/flow,mroch/flow,MichaelDeBoey/flow,TiddoLangerak/flow,mroch/flow,gabelevi/flow,MichaelDeBoey/flow,mroch/flow,popham/flow,gabelevi/flow,MichaelDeBoey/flow,nmote/flow,popham/flow,ylu1317/flow,facebook/flow,nmote/flow,JonathanUsername/flow,facebook/flow,ylu1317/flow,jamesgpearce/flow,AgentME/flow,JonathanUsername/flow,gabelevi/flow,mroch/flow,jamesgpearce/flow,TiddoLangerak/flow,mroch/flow,AgentME/flow,popham/flow,nmote/flow,jamesgpearce/flow,popham/flow,JonathanUsername/flow,popham/flow,claudiopro/flow,samwgoldman/flow,ylu1317/flow,JonathanUsername/flow,samwgoldman/flow,gabelevi/flow,facebook/flow,JonathanUsername/flow,TiddoLangerak/flow,nmote/flow,jamesgpearce/flow,samwgoldman/flow,samwgoldman/flow,facebook/flow,TiddoLangerak/flow,gabelevi/flow,jamesgpearce/flow,MichaelDeBoey/flow,MichaelDeBoey/flow,JonathanUsername/flow,claudiopro/flow,claudiopro/flow,facebook/flow