Remove git commit template from Arcanist
Remove git commit template from Arcanist

Summary: Out of date an no longer referenced.

Test Plan: Grepped for references.

Reviewers: btrahan, vrana

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2387

haskell-infra/arcanist,KieranHayes/arcanist,fivestars/arcanist,PageUpPeopleOrg/arcanist-patches,codelabs-ch/arcanist,chundongwang/arcanist,sneakpeeq/arcanist,codelabs-ch/arcanist,phacility/arcanist,zhihu/arcanist,calblueprint/arcanist,dguo-coursera/arcanist,uber/arcanist,wxstars/arcanist,Khan/arcanist,PageUpPeopleOrg/arcanist-patches,dguo-coursera/arcanist,hach-que/arcanist,folsom-labs/arcanist,eSpark/arcanist,KieranHayes/arcanist,wharris/arcanist,memsql/arcanist,phacility/arcanist,KieranHayes/arcanist,julkiewicz/arcanist,hach-que/arcanist,wxstars/arcanist,aik099/arcanist,jra3/arcanist,Symplicity/arcanist,wharris/arcanist,alexmv/arcanist,julkiewicz/arcanist,r4nt/arcanist,wharris/arcanist,Khan/arcanist,alexmv/arcanist,phacility/arcanist,aik099/arcanist,haskell-infra/arcanist,wikimedia/phabricator-arcanist,alexmv/arcanist,julkiewicz/arcanist,sneakpeeq/arcanist,eSpark/arcanist,eSpark/arcanist,wikimedia/phabricator-arcanist,phacility/arcanist,wharris/arcanist,memsql/arcanist,uber/arcanist,zhihu/arcanist,chundongwang/arcanist,jra3/arcanist,fivestars/arcanist,calblueprint/arcanist,haskell-infra/arcanist,folsom-labs/arcanist,codelabs-ch/arcanist,kevinseelbach/arcanist,KieranHayes/arcanist,r4nt/arcanist,Khan/arcanist,jra3/arcanist,Symplicity/arcanist,wikimedia/phabricator-arcanist,coursera/arcanist,jra3/arcanist,julkiewicz/arcanist,wxstars/arcanist,uber/arcanist,fivestars/arcanist,zhihu/arcanist,coursera/arcanist,aik099/arcanist,dguo-coursera/arcanist,chundongwang/arcanist,memsql/arcanist,wxstars/arcanist,haskell-infra/arcanist,Symplicity/arcanist,folsom-labs/arcanist,PageUpPeopleOrg/arcanist-patches,uber/arcanist,hach-que/arcanist,Symplicity/arcanist,alexmv/arcanist,r4nt/arcanist,folsom-labs/arcanist,fivestars/arcanist,zhihu/arcanist,codelabs-ch/arcanist,r4nt/arcanist,dguo-coursera/arcanist,calblueprint/arcanist,eSpark/arcanist,chundongwang/arcanist,codelabs-ch/arcanist,aik099/arcanist,memsql/arcanist,kevinseelbach/arcanist,kevinseelbach/arcanist,sneakpeeq/arcanist,wikimedia/phabricator-arcanist,sneakpeeq/arcanist,calblueprint/arcanist,PageUpPeopleOrg/arcanist-patches,kevinseelbach/arcanist,coursera/arcanist,Khan/arcanist,phacility/arcanist,hach-que/arcanist,coursera/arcanist