dev-haskell/category-extras: get rid of representable-profunctors depend

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/representable-profunctors: deleted (deprecated by upstream in favour of profunctor-extras)

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>