ci: try removing exclude: to make Azure jobs work again

Author: dw

.ci/azure-pipelines.yml

@@ -3,11 +3,6 @@
 # Add steps that analyze code, save the dist with the build record, publish to a PyPI-compatible index, and more:
 # https://docs.microsoft.com/azure/devops/pipelines/languages/python
 
-trigger:
-  branches:
-    exclude:
-    - docs-master
-
 jobs:
 
 - job: Mac