Revert "Fixed the remaining Manager runtime coupling."

This reverts commit bc45608023.

src/proxy.ts

@@ -91,11 +91,6 @@ export async function handleProxyRequest(req: AuthenticatedNextRequest) {
   // Manager is a separate deployment and hostname, so its root pathname is
   // normally `/`, not `/manager`. Branch before loading any business module.
   if (process.env.MANAGER_MODE === "true") {
-    if (pathname === "/") {
-      const response = NextResponse.redirect(new URL("/manager", req.nextUrl.origin));
-      response.headers.set("Content-Security-Policy", csp);
-      return response;
-    }
     const response = NextResponse.next();
     response.headers.set("Content-Security-Policy", csp);
     return response;