Revert "OWNERS: Auto Sync OWNERS files from community membership (#2263…

…)" (#2308)

This reverts commit eee25bb.

OWNERS

@@ -1,13 +1,15 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 approvers:
-  - '9547'
-  - AstroProfundis
-  - july2993
-  - kaaaaaaang
-  - lonng
-  - lucklove
-  - nrc
-  - srstack
+# tiup-maintainers:
+- kaaaaaaang
+# tiup-committers: 0 members
+emeritus_approvers:
+- lonng
+- lucklove
+- AstroProfundis
 reviewers:
-  - birdstorm
-  - breezewish
+# tiup-reviewers:
+- nexustar
+- breezewish
+- srstack
+- iguoyr