Drop project definitions for some x/* repos

In [0] some repos from the x/* with persistent config errors were
dropped from zuul. Now we also need to remove these repos from the
project definitions within this repo.

[0] I7cfeda034f65056b265ff58acd4607b200152cdc

Change-Id: I2dc3398273f9bf9ca735349fa7809a2f62a34e7d

zuul.d/projects.yaml

@@ -5200,13 +5200,6 @@
     templates:
       - publish-to-pypi
 
-- project:
-    name: x/gce-api
-    templates:
-      - openstack-python-jobs
-      - check-requirements
-      - publish-to-pypi
-
 - project:
     name: x/gerrit-dash-creator
     templates:
@@ -5243,13 +5236,6 @@
     templates:
       - noop-jobs
 
-- project:
-    name: x/glare
-    templates:
-      - openstack-python-jobs
-      - check-requirements
-      - publish-to-pypi
-
 - project:
     name: x/glare-specs
     templates:
@@ -5484,20 +5470,6 @@
       - openstack-python-jobs
       - publish-to-pypi
 
-- project:
-    name: x/mixmatch
-    templates:
-      - check-requirements
-      - openstack-python-jobs
-      - publish-to-pypi
-
-- project:
-    name: x/mogan
-    templates:
-      - openstack-cover-jobs
-      - openstack-python-jobs
-      - check-requirements
-
 - project:
     name: x/mogan-specs
     templates:
@@ -5581,11 +5553,6 @@
     templates:
       - openstack-python-jobs-neutron
 
-- project:
-    name: x/networking-cisco
-    templates:
-      - publish-to-pypi
-
 - project:
     name: x/networking-cumulus
     templates:
@@ -6650,27 +6617,6 @@
     templates:
       - publish-to-pypi
 
-- project:
-    name: x/vmware-nsx
-    queue: vmware-nsx
-    templates:
-      - periodic-jobs-with-neutron-lib-master
-      - publish-to-pypi
-    periodic:
-      jobs:
-        - openstack-tox-py39-with-neutron-lib-master:
-            timeout: 5400
-            required-projects:
-              - openstack/networking-sfc
-              - openstack/neutron
-              - openstack/neutron-dynamic-routing
-              - openstack/neutron-fwaas
-              - openstack/neutron-vpnaas
-              - openstack/octavia
-              - x/networking-l2gw
-              - openstack/tap-as-a-service
-              - x/vmware-nsxlib
-
 - project:
     name: x/vmware-nsx-tempest-plugin
     queue: vmware-nsx