Remove seemingly obsolete "johnsnownlp" service

The service was causing docker compose to fail. It seems to simply no
longer be available.
Status Job ID Name Coverage
  Cabal
failed #13772
cabal

 
  Stack
skipped #13773
stack
 
  Bench
skipped #13774
allowed to fail manual
bench
 
  Test
skipped #13775
test
 
Name Stage Failure
failed
cabal Cabal There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace