revert: "ci: add tool to sync with project board" (#34817)

Reverts #34776 as the current workflow runs are failing and this also leading to build failures

Author: kumvprat

.github/workflows/README.md

@@ -139,6 +139,3 @@ Owner: CDK Support team
 
 [project-prioritization-added-on.yml](project-prioritization-added-on.yml): GitHub action that runs every day to update AddedOn field in the prioritization project board.
 Owner: CDK Support team
-
-### Issue sync
-[issue-sync.yml](issue-sync.yml): Github action that syncs issue metadat with the project board. More details can be found on the [project-sync](../../tools/@aws-cdk/project-sync) package.

.github/workflows/issue-sync.yml

@@ -84,7 +84,6 @@
       "tools/@aws-cdk/prlint",
       "tools/@aws-cdk/spec2cdk",
       "tools/@aws-cdk/lazify",
-      "tools/@aws-cdk/project-sync",
       "tools/@aws-cdk/lambda-integration-test-updater",
       "tools/@aws-cdk/construct-metadata-updater",
       "scripts/@aws-cdk/script-tests"