Bit-rotting(?) HUGS-specific code in GHC boot libraries

Hello GHC devs, ...as the topic came up in #ghc, what's the current rationale for keeping HUGS-specific code sprinkled throughout GHC boot libraries? I quick tally in GHC's source tree via find -type f -iname '*.*hs' | xargs grep '#if.*HUGS' | cut -f1-3 -d/ | uniq -c results in 1 ./libraries/directory 5 ./libraries/haskell98 84 ./libraries/base 5 ./libraries/haskell2010 29 ./libraries/array 12 ./libraries/process 1 ./libraries/bytestring Does anyone actually still use/test those packages in HUGS? Is there any real benefit to keep the HUGS-specific code as dead (compile-time) code in those packages? (When) can that code be removed? Cheers, hvr