S2S: Temporarily disable integrity proof verification

There's a bug in it, I want to make progress with the ongoing funded tasks and
fix the bug after that.

src/Vervis/Federation/Auth.hs

@@ -471,10 +471,12 @@ authenticateActivity now = do
                 pure $ ActivityAuthRemote ra
 
     -- Verify FEP-8b32 jcs-eddsa-2022 VC data integrity proof
+    {-
     for_ (AP.activityProof activity) $ \ proof -> do
         hl <- hostIsLocalOld hActivity
         unless hl $
             verifyIntegrityProof raw hActivity (activityActor activity) proof
+    -}
 
     return (auth, ActivityBody body raw activity)
     where