tests: Removed 40.perlbmk tests

tests: Removed 40.perlbmk tests

In an effort to cleanup the old tests, and migrate useful tests to be
executed via `test/main.py`, it has been decided that the
`test/long/se/40.perlbmk` tests should be removed.

Jira: https://gem5.atlassian.net/browse/GEM5-109
Change-Id: I3c7ea79717c90acf0656f30b878eb3f9f33fdb70
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24403
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>