Revert "fix: patch canvas-auth test for missing A2UI assets in test build"

This reverts commit 548f133.

Author: arubis

nix/scripts/gateway-postpatch.sh

@@ -32,18 +32,6 @@ if [ -f src/agents/shell-utils.ts ]; then
   fi
 fi
 
-# The canvas-auth test was renamed from .e2e.test.ts to .test.ts upstream,
-# bringing it into the gateway vitest suite for the first time. It expects
-# A2UI assets (a2ui.bundle.js) on disk, but the Nix test build doesn't run
-# canvas:a2ui:bundle.  Relax the assertion to accept 503 (assets not found)
-# until the test build is expanded to produce the bundle.
-# Tracked in: https://github.com/openclaw/nix-openclaw/issues/64
-if [ -f src/gateway/server.canvas-auth.test.ts ]; then
-  if grep -q 'scopedA2ui\.status.*toBe(200)' src/gateway/server.canvas-auth.test.ts; then
-    sed -i 's/expect(scopedA2ui\.status)\.toBe(200)/expect(scopedA2ui.status).toBe(503)/' src/gateway/server.canvas-auth.test.ts
-  fi
-fi
-
 if [ -f src/docker-setup.test.ts ]; then
   if ! grep -q "#!/bin/sh" src/docker-setup.test.ts; then
     sed -i 's|#!/usr/bin/env bash|#!/bin/sh|' src/docker-setup.test.ts