The long/nightly tests are failing due to timeout (e.g.: https://jenkins.gem5.org/job/nightly/398/). We must therefore be more careful about what we test on a nightly basis. Each of these ARM boot tests takes an hour and, generally, are largely the same (just with different CPU cores, cache hierarchy, and memory system). Given this is largely redundant, some of these tests have been removed to save on testing time. Change-Id: I8d80d3e0869aca67aa7279a164bdce85d20f3682 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65191 Maintainer: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>