sync (#15470)

Author: Phoenix He

.github/issue_assignment.yml

@@ -2,7 +2,6 @@
 - rule:
     booleanFilterExpression: "needs-triage"
     assignees:
-      - PhoenixHe-msft
       - raych1
       - akning-ms
       - leni-msft

.github/pull_request_assignment.yml

@@ -128,37 +128,19 @@
     reviewers:
       - fengzhou-msft
 
-- rule:
-    paths:
-      - "specification/@(containerservice|containerinstance)/**"
-    reviewers:
-      - PhoenixHe-msft
-
 - rule:
     paths:
       - "specification/mixedreality/**"
       - "specification/hdinsight/**"
     reviewers:
       - leni-msft
 
-- rule:
-    paths:
-      - "specification/portal/**"
-    reviewers:
-      - PhoenixHe-msft
-
 - rule:
     paths:
       - "specification/web/**"
     reviewers:
       - weidongxu-microsoft
 
-- rule:
-    paths:
-      - "specification/testbase/**"
-    reviewers:
-      - PhoenixHe-msft
-      
 - rule:
     paths:
       - "specification/servicelinker/**"
@@ -188,7 +170,6 @@
       - ".azure-pipelines-preproduction/**"	
     reviewers:
       - akning-ms
-      - PhoenixHe-msft
       - raych1
       - zhenglaizhang
 
@@ -197,7 +178,6 @@
     paths:
       - "**"
     reviewers:
-      - PhoenixHe-msft
       - lirenhe
       - weidongxu-microsoft
       - ArcturusZhang