Remove no longer needed parameters.

generic-pipelines/test-pipeline.yaml

@@ -11,9 +11,6 @@ spec:
     description: Shared data.
   - name: git-credentials
     description: tekton git credentials
-  params:
-  - name: pr-id
-    description: ID number of the current PR.
   tasks:
   - name: fetch-repo
     workspaces: