Removes obsolete jobs

Removes the definitions of:
- tf-m-nightly-for-test
- tf-m-release-static
- tf-m-split-build
- tf-m-build-docs-nightly

Change-Id: I63a8a4d19808f5c7b45c9dc1745dbad2947d77aa
Signed-off-by: Matthew Dalzell <matthew.dalzell@arm.com>
4 files changed