remove SIG label from OWNERS file

neolit123 · web-flow · commit e78b1ec378f5 · 2022-03-30T18:18:59.000+03:00
subproject or SIG labels are not needed on PRs/issues as they are implied.
helps for better org wide triage on SIG CL tickets, coming from third parties.
diff --git a/OWNERS b/OWNERS
@@ -8,6 +8,3 @@ approvers:
 
 reviewers:
   - cluster-api-packet-maintainers
-
-labels:
-  - sig/cluster-lifecycle
