mem-ruby: Revert 7018c2b34
mem-ruby: Revert 7018c2b34

This reverts commit 7018c2b34e83c592843bd4ad714f93bc6179866d. This
commit needs more work which will take a while. Meanwhile the nightly
tests are broken because of this.

Change-Id: I11d01d50ab3a2d8fd649f1a825911e14815b1ca6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/57109
Reviewed-by: Bobby Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Maintainer: Bobby Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5