Fix learning path

Author: gitName

learn-pr/paths/create-serverless-applications/index.yml

@@ -38,7 +38,6 @@ modules:
 - learn.azure-create-long-running-serverless-workflow-with-durable-functions
 - learn.develop-test-deploy-azure-functions-with-visual-studio
 - learn.azure.monitor-github-events-with-a-function-triggered-by-a-webhook
-- learn.advocates.azure-functions-and-signalr
 - learn.build-serverless-api-with-functions-api-management
 - learn.student-evangelism.serverless-go
 trophy: