ci: remove hold-over files from legacy CI

Everything this commit removes is unused by the current incarnation of
the Open CI, and hasn't been used in several years either by the Open CI
or the local CI.

Change-Id: I0c5f8bbc7e08031d979c172111e52ac4eb7ab15b
Signed-off-by: Chris Kay <chris.kay@arm.com>
(cherry picked from commit 1a34d57f749818445bffcc34a00e9ea7f565cdad)
55 files changed