Drop Nodejs v16 job

As nodejs v18 job is passing in horizon and all horizon
plugins [1]. So we didn't require the nodejs v16 job.

This patch removes the nodejs v16 job definition from
``.zuul.d/nodejs-jobs.yaml`` and other nodejs v16 job
references.

[1] https://review.opendev.org/c/openstack/horizon/+/865293

Change-Id: I9e791c24944f228a27813eb860080d3ea3e1449d

.zuul.d/nodejs-jobs.yaml

@@ -1,17 +1,3 @@
-- job:
-    name: horizon-nodejs16-run-lint
-    parent: nodejs-run-lint
-    description: |
-      Run lint using Node 16 for horizon plugins.
-    vars:
-      node_version: 16
-      tox_constraints_file: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
-    nodeset: ubuntu-focal
-    pre-run: playbooks/horizon-nodejs/pre.yaml
-    required-projects:
-      - openstack/horizon
-      - openstack/requirements
-
 - job:
     name: horizon-nodejs18-run-lint
     parent: nodejs-run-lint
@@ -26,20 +12,6 @@
       - openstack/horizon
       - openstack/requirements
 
-- job:
-    name: horizon-nodejs16-run-test
-    parent: nodejs-run-test-browser
-    description: |
-      Run test using Node 16 for horizon plugins.
-    vars:
-      node_version: 16
-      tox_constraints_file: "{{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/requirements'].src_dir }}/upper-constraints.txt"
-    pre-run: playbooks/horizon-nodejs/pre.yaml
-    nodeset: ubuntu-focal
-    required-projects:
-      - openstack/horizon
-      - openstack/requirements
-
 - job:
     name: horizon-nodejs18-run-test
     parent: nodejs-run-test-browser
@@ -58,20 +30,16 @@
     name: horizon-nodejs-jobs
     description: |
       This project template is defined to run lint and test jobs using
-      Node LTS version (i.e. 16 now) for horizon plugins. horizon plugins
+      Node LTS version (i.e. 18 now) for horizon plugins. horizon plugins
       can use this template to run nodejs jobs. So if we want to update
       nodejs version in horizon plugins we can update this template to use
       the job with the latest node version and not many changes are required
       in the horizon plugins side.
     check:
       jobs:
-        - horizon-nodejs16-run-lint
-        - horizon-nodejs16-run-test
         - horizon-nodejs18-run-lint
         - horizon-nodejs18-run-test
     gate:
       jobs:
-        - horizon-nodejs16-run-lint
-        - horizon-nodejs16-run-test
         - horizon-nodejs18-run-lint
         - horizon-nodejs18-run-test

.zuul.d/project.yaml

@@ -26,10 +26,8 @@
       jobs:
         - horizon-integration-tests-xstatic-master
         - horizon-tox-py36-xstatic-master
-        - horizon-nodejs16-run-test-xstatic-master
         - horizon-nodejs18-run-test-xstatic-master
     periodic:
       jobs:
-        - horizon-nodejs16-run-test
         - horizon-nodejs18-run-test
         - horizon-integration-tests

.zuul.d/xstatic-master.yaml

@@ -30,12 +30,6 @@
     parent: openstack-tox-py39
     required-projects: *xstatic-projects
 
-- job:
-    name: horizon-nodejs16-run-test-xstatic-master
-    parent: horizon-nodejs16-run-test
-    required-projects: *xstatic-projects
-    pre-run: playbooks/npm-test-xstatic-master/pre.yaml
-
 - job:
     name: horizon-nodejs18-run-test-xstatic-master
     parent: horizon-nodejs18-run-test