Clean up pipeline

Author: peombwa

.azure-pipelines/weekly-generation.yml

@@ -73,9 +73,6 @@ jobs:
     variables:
       WeeklyBranch: $[ dependencies.RefreshOpenAPIDocuments.outputs['ComputeBranch.WeeklyBranch'] ]
     steps:
-      - template: ./common-templates/checkout.yml
-        parameters:
-          TargetBranch: $(GenerationBranch) # Gives git local knowledge of the branch for merge.
       - template: ./common-templates/checkout.yml
         parameters:
           TargetBranch: $(WeeklyBranch)