[easy] Delete some unused Flow lexer tokens
[easy] Delete some unused Flow lexer tokens

Summary: Discovered these last week while running through highlighting for phabricator

Reviewed By: @gabelevi

Differential Revision: D2351638

lyip1992/flow,ForbesLindesay/flow,jeffmo/flow,CJstar/flow,facebook/flow,danvk/flow,TiddoLangerak/flow,siddhartharay007/flow,siddhartharay007/flow,claudiopro/flow,JohnyDays/flow,JonathanUsername/flow,siddhartharay007/flow,ForbesLindesay/flow,gabelevi/flow,ianobermiller/flow,fletcherw/flow,danvk/flow,jgrund/flow,cesarandreu/flow,fletcherw/flow,fletcherw/flow,Fresheyeball/flow,gabelevi/flow,Drooids/flow,AprilArcus/flow,mroch/flow,facebook/flow,KevinTCoughlin/flow,mroch/flow,OCamlPro/flow,chenglou/flow,graue/flow,OCamlPro/flow,claudiopro/flow,ForbesLindesay/flow,gabelevi/flow,graue/flow,Eyyub/flow,MichaelDeBoey/flow,Fresheyeball/flow,samwgoldman/flow,ylu1317/flow,claudiopro/flow,KevinTCoughlin/flow,Fresheyeball/flow,popham/flow,Wanderfalke/flow,Wanderfalke/flow,nmote/flow,shiftcars/flow,dv/flow,jeffmo/flow,JonathanUsername/flow,claudiopro/flow,gabelevi/flow,samwgoldman/flow,lyip1992/flow,jdelStrother/flow,jdelStrother/flow,danvk/flow,JohnyDays/flow,cesarandreu/flow,samwgoldman/flow,jeffutter/flow,CJstar/flow,samwgoldman/flow,cesarandreu/flow,gabro/flow,shiftcars/flow,popham/flow,jgrund/flow,jamesgpearce/flow,d14b3l/flow,Eyyub/flow,facebook/flow,jamesgpearce/flow,graue/flow,chenglou/flow,jeffutter/flow,AprilArcus/flow,mcanthony/flow-type,gabro/flow,d14b3l/flow,AprilArcus/flow,jeffmo/flow,danvk/flow,samwgoldman/flow,lyip1992/flow,paulshen/flow,Drooids/flow,chenglou/flow,JohnyDays/flow,graue/flow,shiftcars/flow,gabro/flow,dv/flow,ForbesLindesay/flow,jgrund/flow,shiftcars/flow,JonathanUsername/flow,nmote/flow,nmote/flow,MichaelDeBoey/flow,ylu1317/flow,nmote/flow,mroch/flow,ianobermiller/flow,popham/flow,AgentME/flow,jgrund/flow,popham/flow,jgrund/flow,mcanthony/flow-type,fletcherw/flow,facebook/flow,siddhartharay007/flow,MichaelDeBoey/flow,gabro/flow,JonathanUsername/flow,jgrund/flow,OCamlPro/flow,jamesgpearce/flow,graue/flow,darioajr/flow,gabelevi/flow,jeffutter/flow,jdelStrother/flow,d14b3l/flow,asivitz/flow,d14b3l/flow,AgentME/flow,JonathanUsername/flow,shiftcars/flow,gabelevi/flow,mcanthony/flow-type,ylu1317/flow,Drooids/flow,facebook/flow,jeffmo/flow,JonathanUsername/flow,nmote/flow,samwgoldman/flow,CJstar/flow,jamesgpearce/flow,JohnyDays/flow,d14b3l/flow,AgentME/flow,facebook/flow,dv/flow,ForbesLindesay/flow,OCamlPro/flow,paulshen/flow,shiftcars/flow,gabelevi/flow,paulshen/flow,nmote/flow,TiddoLangerak/flow,popham/flow,claudiopro/flow,darioajr/flow,AgentME/flow,Wanderfalke/flow,Drooids/flow,KevinTCoughlin/flow,graue/flow,jdelStrother/flow,ianobermiller/flow,jeffmo/flow,Fresheyeball/flow,facebook/flow,AprilArcus/flow,mroch/flow,cesarandreu/flow,jamesgpearce/flow,Eyyub/flow,fletcherw/flow,AprilArcus/flow,popham/flow,JonathanUsername/flow,ylu1317/flow,mroch/flow,darioajr/flow,paulshen/flow,ylu1317/flow,gabro/flow,asivitz/flow,chenglou/flow,gabro/flow,jeffutter/flow,mcanthony/flow-type,ForbesLindesay/flow,Eyyub/flow,Wanderfalke/flow,jamesgpearce/flow,jamesgpearce/flow,KevinTCoughlin/flow,TiddoLangerak/flow,nmote/flow,chenglou/flow,fletcherw/flow,jdelStrother/flow,chenglou/flow,d14b3l/flow,lyip1992/flow,ianobermiller/flow,CJstar/flow,jeffmo/flow,TiddoLangerak/flow,TiddoLangerak/flow,dv/flow,mroch/flow,asivitz/flow,popham/flow,MichaelDeBoey/flow,darioajr/flow,AprilArcus/flow,AgentME/flow,asivitz/flow,samwgoldman/flow,MichaelDeBoey/flow,jdelStrother/flow,mroch/flow