Update community files (#405)

Signed-off-by: Knative Automation <[email protected]>

Author: knative-automation

OWNERS_ALIASES

@@ -23,10 +23,8 @@ aliases:
   discovery-approvers:
   - lberk
   docs-wg-leads:
-  - abrennan89
   - snneji
   docs-writers:
-  - abrennan89
   - csantanapr
   - psschwei
   - snneji
@@ -284,8 +282,6 @@ aliases:
   - psschwei
   - zroubalik
   ux-wg-leads:
-  - abrennan89
   - snneji
   ux-writers:
-  - abrennan89
   - snneji