remove Azure pipeline config file to use GitHub CI instead

azure-pipelines.yml

@@ -1,16 +0,0 @@
-# Starter pipeline
-# Start with a minimal pipeline that you can customize to build and deploy your code.
-# Add steps that build, run tests, deploy, and more:
-# https://aka.ms/yaml
-
-trigger:
-- dev-7.0
-
-pool:
-  vmImage: 'ubuntu-latest'
-
-steps:
-  - script: |
-      cd tests
-      python build.py
-    displayName: 'Build'