literate-haskell-mode disables fill-paragraph behavior

Link: https://github.com/haskell/haskell-mode/blob/master/haskell-mode.el#L974

If I go into a literate buffer and set fill-paragraph-handle-comment to t, M-q works correctly. Can this be removed now? The comment was written in 2008, so it is probably not relevant anymore.

Start at haskell-mode.el around line 974 and inspect the literate-buffer handling and its 2008 comment. Check the behavior with fill-paragraph-handle-comment set to t, then remove the outdated disabling logic if the setting makes M-q work correctly. Confirm that M-q retains the expected fill-paragraph behavior in a literate buffer.

Written by the indexing model from the issue text.