Remove hlint as default HaskellTool

Closed Julian Ospald requested to merge maerwald/ci-images:rm-hlint into master

Hlint is usually used once in a pipeline, not per-job or per architecture/platform. Thus, we only need one hlint image.

It can easily be installed in an x86_64 image:

curl -sSL | sh -s .

This might also fix image build issues.

Edited by Julian Ospald

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