Remove CNAME file
Remove CNAME file

Summary: The CNAME file causes custom behavior for github pages that worked on our buckbuild.com configuration, but no longer works for buck.build (we were getting redirect loops due to this). Remove it so that the next doc push does not cause broken redirects again.

fbshipit-source-id: 777005d22a

JoelMarcey/buck,Addepar/buck,nguyentruongtho/buck,Addepar/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,nguyentruongtho/buck,JoelMarcey/buck,kageiit/buck,zpao/buck,nguyentruongtho/buck,kageiit/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,zpao/buck,nguyentruongtho/buck,facebook/buck,JoelMarcey/buck,Addepar/buck,Addepar/buck,Addepar/buck,zpao/buck,Addepar/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,zpao/buck,facebook/buck,JoelMarcey/buck,Addepar/buck,nguyentruongtho/buck,Addepar/buck,facebook/buck,kageiit/buck,kageiit/buck,kageiit/buck,JoelMarcey/buck,Addepar/buck,zpao/buck,Addepar/buck,kageiit/buck,Addepar/buck,nguyentruongtho/buck,kageiit/buck,facebook/buck,Addepar/buck,zpao/buck,JoelMarcey/buck,zpao/buck,Addepar/buck,nguyentruongtho/buck,facebook/buck