delete unnecessary Makefile.coq.local; update .gitignore

6 jobs for master in 8 minutes and 3 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build-coq.8.6.1 #7956
fp-timing

00:02:14

passed build-coq.8.7.1 #7955
fp-timing

00:02:17

 
  Deploy
passed opam #7957

00:00:15

 
  Build More
passed build-coq.8.6.0 #7960
fp-timing

00:02:18

passed build-coq.8.7.0 #7959
fp-timing

00:02:14

passed build-coq.8.7.dev #7958
fp-timing

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