Skip alterations to haskell env

These were meant to reduce closure size, but it doesn't seem like they
help.
1 job for master in 62 minutes and 47 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
failed build #1078

01:02:47

 
Name Stage Failure
failed
build Test There is an unknown failure, please try again
--  While building package language-javascript-0.6.0.14 using:
/root/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_2.4.0.1_ghc-8.6.5 --builddir=.stack-work/dist/x86_64-linux/Cabal-2.4.0.1 build --ghc-options " -ddump-hi -ddump-to-file"
Process exited with code: ExitFailure 1
Logs have been written to: /builds/league/bookme/.stack-work/logs/language-javascript-0.6.0.14.log

Configuring language-javascript-0.6.0.14...
Preprocessing library for language-javascript-0.6.0.14..
happy: src/Language/JavaScript/Parser/Grammar7.y: hGetContents: invalid argument (invalid byte sequence)
ERROR: Job failed: exit code 1