Previously, due to issues in the erlang package, many tests would fail, and
the package would also nondeterministically fail to build. This is now
fixed (by patching occurrences of /bin/sh in the erlang package), so all the
tests can be run.
* gnu/packages/elixir.scm (elixir)[source]: Remove patches.
[arguments]: Remove the fix-or-disable-tests phase. Add a new set-home phase
to set the HOME environment variable prior to running the tests.
* gnu/packages/patches/elixir-disable-failing-tests.patch: Delete this file.
* gnu/local.mk: Remove now deleted patch.
