Remove SQLAlchemy tips jobs

The most recent SQLAlchemy and Alembic versions are now in
upper-constraints. As a result, this job has served its purpose and can
be removed. For more information, see [1].

[1] https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/thread/RBHXHTO3GUOOXVSZXD4C2O3TKDOH2QSC/

Change-Id: I968b393ef22616c4d58b29974ad38f97075915c7
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Depends-on: https://review.opendev.org/c/openstack/requirements/+/879743

.zuul.yaml

@@ -11,7 +11,6 @@
       jobs:
         - cinder-code-coverage:
             voting: false
-        - cinder-sqlalchemy-2x
         - cinder-mypy
         - cinder-tox-bandit-baseline:
             voting: false
@@ -161,21 +160,6 @@
       - ^tools/.*$
       - ^tox.ini$
 
-- job:
-    name: cinder-sqlalchemy-2x
-    parent: openstack-tox-py311
-    description: |
-      Run unit tests with main branch of SQLAlchemy, alembic and oslo.db.
-      Takes advantage of the base tox job's install-siblings feature.
-    # The job only tests the latest and shouldn't be run on the stable branches
-    branches: master
-    required-projects:
-      - name: github.com/sqlalchemy/sqlalchemy
-        override-checkout: main
-      - name: github.com/sqlalchemy/alembic
-        override-checkout: main
-      - name: openstack/oslo.db
-
 - job:
     name: cinder-rally-task
     parent: rally-task-cinder