Removing py36 gates from zuul for rook-ceph

Removing redundant py36 Zuul jobs since we now have py39 Zuul jobs in
place with the debian nodeset

Story: 2006796
Task: 43494
Signed-off-by: Bernardo Decco <bernardo.deccodesiqueira@windriver.com>
Change-Id: I675b2a8a5865a794c43a140d75a8f2383ff7a185

.zuul.yaml

@@ -4,7 +4,6 @@
       jobs:
         - openstack-tox-linters
         - k8sapp-rook-ceph-tox-py27
-        - k8sapp-rook-ceph-tox-py36
         - k8sapp-rook-ceph-tox-py39
         - k8sapp-rook-ceph-tox-flake8
         - k8sapp-rook-ceph-tox-pylint
@@ -13,7 +12,6 @@
       jobs:
         - openstack-tox-linters
         - k8sapp-rook-ceph-tox-py27
-        - k8sapp-rook-ceph-tox-py36
         - k8sapp-rook-ceph-tox-py39
         - k8sapp-rook-ceph-tox-flake8
         - k8sapp-rook-ceph-tox-pylint
@@ -39,23 +37,6 @@
       tox_envlist: py27
       tox_extra_args: -c python-k8sapp-rook/k8sapp_rook/tox.ini
 
-- job:
-    name: k8sapp-rook-ceph-tox-py36
-    parent: tox
-    description: |
-      Run py36 test for k8sapp_rook_ceph
-    nodeset: ubuntu-bionic
-    required-projects:
-      - starlingx/config
-      - starlingx/fault
-      - starlingx/update
-      - starlingx/utilities
-    files:
-      - python-k8sapp-rook/*
-    vars:
-      tox_envlist: py36
-      tox_extra_args: -c python-k8sapp-rook/k8sapp_rook/tox.ini
-
 - job:
     name: k8sapp-rook-ceph-tox-py39
     parent: tox-py39