No trigger for PRs

Author: kyle-rader-msft

.azuredevops/ci.yml

@@ -4,6 +4,8 @@ variables:
     value: "production"
     readonly: true
 
+pr: none
+
 trigger:
   branches:
     include:
@@ -39,4 +41,4 @@ extends:
       roslyn:
         copyLogsOnly: true
     stages:
-    - template: BuildAndTest.yml
+    - template: BuildAndTest.yml