Fix tripleo-docs doc job

We don't need to exclude anything for this repo. We should always run
the docs job for tripleo-docs

Change-Id: I546a6b48efa13d92527b3547fca530897f7f451f

zuul.d/projects.yaml

@@ -16323,20 +16323,10 @@
       - publish-openstack-sphinx-docs
     check:
       jobs:
-        - build-openstack-sphinx-docs:
+        - build-openstack-sphinx-docs
-            files:
-              - ^tox.ini$
-              - ^deploy-guide/.*
-              - bindep.txt
-              - other-requirements.txt
     gate:
       jobs:
-        - build-openstack-sphinx-docs:
+        - build-openstack-sphinx-docs
-            files:
-              - ^tox.ini$
-              - ^deploy-guide/.*
-              - bindep.txt
-              - other-requirements.txt
 
 - project:
     name: openstack/tripleo-ha-utils