devel/hs-haskell-language-server: Remove duplicate distinfo entries

[jrm]

Summary

These duplicate entries were causing build failures at the fetch stage.

=> lens-5.3.5/lens-5.3.5.tar.gz doesn't seem to exist in /portdistfiles/cabal.
=> Attempting to fetch https://hackage.haskell.org/package/lens-5.3.5/lens-5.3.5.tar.gz
fetch: lens-5.3.5/lens-5.3.5.tar.gz is not a directory
=> Attempting to fetch http://hackage.haskell.org/package/lens-5.3.5/lens-5.3.5.tar.gz
fetch: lens-5.3.5/lens-5.3.5.tar.gz is not a directory
=> Attempting to fetch http://distcache.FreeBSD.org/ports-distfiles/cabal/lens-5.3.5/lens-5.3.5.tar.gz
fetch: lens-5.3.5/lens-5.3.5.tar.gz is not a directory
=> Couldn't fetch it - please try to retrieve this
=> port manually into /portdistfiles/cabal and try again.
*** Error code 1

[jrm]

You can see a full poudriere log at https://pkg.ftfl.ca/data/16amd64-default/2026-02-01_13h04m48s/logs/errors/hs-haskell-language-server-2.12.0.0_1.log
I didn't investigate why the steps described in https://docs.freebsd.org/en/books/porters-handbook/book/#using-cabal result in a distinfo file with these duplicate entries.