Remove sbwsg from OWNERS

It made sense for me to be in OWNERS file while we were releasing Beta
but I'm not on top of current website planning/work to review PRs.

OWNERS

@@ -9,5 +9,7 @@ approvers:
 - lucperkins
 - afrittoli
 - skaegi
-- sbwsg
 - AlanGreene
+
+# Alumni ❤️
+# sbwsg