chore: Revert "chore: setup 2.23.x lts branch (#1852)" (#1871)

* Revert "chore: setup 2.23.x lts branch (#1852)"

This reverts commit c28cf93

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix readme

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

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

.github/release-please.yml

@@ -37,13 +37,6 @@ branches:
       - >-
         google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/Version.java
     branch: 2.16.x
-  - bumpMinorPreMajor: true
-    handleGHRelease: true
-    releaseType: java-backport
-    extraFiles:
-      - >-
-        google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/Version.java
-    branch: 2.23.x
   - bumpMinorPreMajor: true
     handleGHRelease: true
     releaseType: java-backport

.github/sync-repo-settings.yaml

@@ -90,21 +90,6 @@ branchProtectionRules:
       - cla/google
       - 'Kokoro - Test: Java GraalVM Native Image'
       - 'Kokoro - Test: Java 17 GraalVM Native Image'
-  - pattern: 2.23.x
-    isAdminEnforced: true
-    requiredApprovingReviewCount: 1
-    requiresCodeOwnerReviews: true
-    requiresStrictStatusChecks: false
-    requiredStatusCheckContexts:
-      - dependencies (17)
-      - lint
-      - clirr
-      - units (8)
-      - units (11)
-      - 'Kokoro - Test: Integration'
-      - cla/google
-      - 'Kokoro - Test: Java GraalVM Native Image'
-      - 'Kokoro - Test: Java 17 GraalVM Native Image'
   - pattern: 2.25.x
     isAdminEnforced: true
     requiredApprovingReviewCount: 1