//File: app\Providers\RouterServiceProvider.php
// Removing prefix line | removendo a linha de prefixo

//Mudar | Change
 protected function mapApiRoutes()
    {
        Route::prefix('api')
             ->middleware('api')
             ->namespace($this->namespace)
             ->group(base_path('routes/api.php'));
    }

  // para | to
     protected function mapApiRoutes()
    {
        Route::middleware('api')
             ->namespace($this->namespace)
             ->group(base_path('routes/api.php'));
    }