Revert matrix changes

Author: wtgodbe

.azure/pipelines/helix-matrix.yml

@@ -1,13 +1,6 @@
 # We only want to run full helix matrix on main
+pr: none
 trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/Servers/IIS/**/*
-    - src/Servers/HttpSys/**/*
 schedules:
 # Cron timezone is UTC.
 - cron: "0 */12 * * *"