[roll] Roll fuchsia [mailbox][banjo] Delete mailbox Banjo protocol

This protocol is not used

Original-Bug: 380607277
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1162753
Original-Revision: 1160a31239005f1d8e1b4f7fa87549dcda5dd12f
GitOrigin-RevId: 12ffdfbd029ccf859a1130cd92e533cc00385420
Change-Id: Ibf67a99afe6475664b2a8e35a28d798b01d14468

Author: Braden Kell

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="bdcbc430d43f621389499db32ef5170601c7da3c"/>
+             revision="1160a31239005f1d8e1b4f7fa87549dcda5dd12f"/>
   </projects>
   <hooks>
     <hook name="install-environment"