rollback API changes about --enable-profiling

Now the released version of cabal-install can be built against
Cabal-1.22.1.0, and there is no need to modify the upper bound on
Hackage. This change prevents Cabal-1.22.1.0 from emitting deprecation
warnings about --enable-executable-profiling, but the correct behavior
of --enable-profiling is preserved. There is no need to rollback the API
changes on master; cabal-install already requires Cabal to have the same
major version.