Re-enable code-cheks

eng/pipelines/build.yml

@@ -31,7 +31,6 @@ jobs:
           DOTNET_MULTILEVEL_LOOKUP: 0
       - pwsh: ./eng/CodeChecks.ps1
         displayName: "Check if code is up-to-date"
-        enabled: false
       - script: |
           dotnet test AutoRest.CSharp.V3.sln
         displayName: "Test"