[PR #7373/66e261a5 backport][3.8] Drop azure mention (#7374)

**This is a backport of PR #7373 as merged into master
(66e261a).**

None

Co-authored-by: Sam Bull <git@sambull.org>

docs/index.rst

@@ -140,9 +140,6 @@ Please feel free to file an issue on the `bug tracker
 <https://github.com/aio-libs/aiohttp/issues>`_ if you have found a bug
 or have some suggestion in order to improve the library.
 
-The library uses `Azure Pipelines <https://dev.azure.com/aio-libs/aiohttp/_build>`_ for
-Continuous Integration.
-
 
 Dependencies
 ============