[hack] Revert "[hack] Fix OS X build with ocaml 4.03"
[hack] Revert "[hack] Fix OS X build with ocaml 4.03"

Summary: Broke with ocaml 4.01, and we don't build with 4.03 for other
reasons anyways.

Reviewed By: @gabelevi

Differential Revision: D2406512

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