Вот такой мидлварь делаешь
<?php
namespace App\Http\Middleware;
use Closure;
class NoDebugBar
{
/**
* Handle an incoming request.
*
*
@param \Illuminate\Http\Request $request
*
@param \Closure $next
*
@return mixed
*/
public function handle($request, Closure $next)
{
\Debugbar::disable();
return $next($request);
}
}