Remove use of `offset` from `flow_prettier_comments.ml`
Remove use of `offset` from `flow_prettier_comments.ml`

Reviewed By: pakoito

Differential Revision: D13248910

fbshipit-source-id: 88faaade4819d2ee4c88bb4e9cabc4d7397202f0

facebook/flow,gabelevi/flow,mroch/flow,mroch/flow,AgentME/flow,AgentME/flow,gabelevi/flow,samwgoldman/flow,mroch/flow,AgentME/flow,popham/flow,gabelevi/flow,gabelevi/flow,samwgoldman/flow,samwgoldman/flow,facebook/flow,samwgoldman/flow,facebook/flow,samwgoldman/flow,AgentME/flow,mroch/flow,facebook/flow,popham/flow,facebook/flow,popham/flow,popham/flow,gabelevi/flow,samwgoldman/flow,popham/flow,popham/flow,gabelevi/flow,AgentME/flow,mroch/flow,mroch/flow,facebook/flow,popham/flow,mroch/flow,gabelevi/flow,facebook/flow,samwgoldman/flow