Revert: add project prioritization automation actions (#33049)

Reverts #33043

.github/workflows/README.md

@@ -55,11 +55,6 @@ When approved this pushes the PR to the testing pipeline,
 thus starting the cli integ test build.
 Owner: Core CDK team
 
-### Initial Priority Assignment
-
-[project-prioritization-assignment.yml](project-prioritization-assignment.yml): GitHub action for automatically adding PR's with priorities to the project priority board based on their labels.
-Owner: CDK Support team
-
 ## Issue Triggered
 
 ### Closed Issue Message
@@ -108,13 +103,3 @@ Owner: Core CDK team
 
 [update-contributors.yml](update-contributors.yml): GitHub action that runs monthly to create a pull request for updating a CONTRIBUTORS file with the top contributors.
 Owner: Core CDK team
-
-### R2 Priority Assignment
-
-[project-prioritization-r2-assignment.yml](project-prioritization-r2-assignment.yml): GitHub action that runs every 6 hours to add PR's to the priority project board that satisfies R2 Priority.
-Owner: CDK Support team
-
-### R5 Priority Assignment
-
-[project-prioritization-r5-assignment.yml](project-prioritization-r5-assignment.yml): GitHub action that runs every day to add PR's to the priority project board that satisfies R5 Priority.
-Owner: CDK Support team