build: remove requirement on docs temporarily (#321)

Source-Link: googleapis/synthtool@b9b4907
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:b907341e49ab3bc8732347ac3e528e82ddb80fac583a4aa2b3493a51ee49f22b

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

core/projectify/.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:e08f9a3757808cdaf7a377e962308c65c4d7eff12db206d4fae702dd50d43430
-# created: 2023-08-03T18:46:14.719706948Z
+  digest: sha256:b907341e49ab3bc8732347ac3e528e82ddb80fac583a4aa2b3493a51ee49f22b
+# created: 2023-09-21T22:14:47.094448222Z

core/projectify/.github/sync-repo-settings.yaml

@@ -7,7 +7,6 @@ branchProtectionRules:
     requiredStatusCheckContexts:
       - "ci/kokoro: Samples test"
       - "ci/kokoro: System test"
-      - docs
       - lint
       - test (14)
       - test (16)