Remove scripts/ci/checks/hlint (#106)
Remove scripts/ci/checks/hlint (#106)

This script would fail in CI with

    ./scripts/ci/checks/hlint: line 6: hlint: command not found

See e.g. https://travis-ci.org/quchen/prettyprinter/jobs/634133471#L1091

The scripts/ci/install/hlint script remains and effectively
performs the HLint check.
quchen/prettyprinter,quchen/prettyprinter