ci: Remove java 11 and java 17 CI from required checks

Author: grayside

.github/sync-repo-settings.yaml

@@ -7,8 +7,6 @@ branchProtectionRules:
   requiredStatusCheckContexts:
     - 'cla/google'
     - 'header-check'
-    - 'Kokoro CI - Java 11'
-    - 'Kokoro CI - Java 17'
     - 'Kokoro CI - Lint'
   requiredApprovingReviewCount: 1
   requiresCodeOwnerReviews: true