fix(config): remove redundant _next/static cache header

Next.js already sets Cache-Control: public, max-age=31536000, immutable
on _next/static assets natively and this cannot be overridden. The custom
rule was redundant on Vercel and conflicted with the extension-based rule
on self-hosted deployments due to last-match-wins ordering.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: emir-karabeg

apps/sim/next.config.ts

@@ -149,15 +149,6 @@ const nextConfig: NextConfig = {
   ],
   async headers() {
     return [
-      {
-        source: '/_next/static/:path*',
-        headers: [
-          {
-            key: 'Cache-Control',
-            value: 'public, max-age=31536000, immutable',
-          },
-        ],
-      },
       {
         source: '/:all*(svg|jpg|jpeg|png|gif|ico|webp|avif|woff|woff2|ttf|eot)',
         headers: [