Comment out user names that cannot be found in AOSP.

Bug: 33166666
Test: default build targets
Change-Id: I5e1508d90a2f817f26d6d37eb9b6d8da74edc0c6
diff --git a/OWNERS b/OWNERS
index 18e6d5f..a6db2d9 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,5 +1,6 @@
-astor
-hta
-juberti
-mikaelp
-tschmelcher
+# TODO: find AOSP user email addresses for the following or new owners.
+# astor
+# hta
+# juberti
+# mikaelp
+# tschmelcher