Remove the (empty) definition of `libart_fake` from the Runtime APEX.

`libart_fake` won't be part of the Runtime APEX, as we do not plan to
make it updatable.

Test: art/build/apex/runtests.sh
Bug: 113373927
Change-Id: I4b85b2094e47e9db604b60098706756bf49fee6a
1 file changed