remove_connection_pool

# File activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb, line 1147
      def remove_connection_pool(owner, role: ActiveRecord::Base.current_role, shard: ActiveRecord::Base.current_shard)
        if pool_manager = get_pool_manager(owner)
          pool_config = pool_manager.remove_pool_config(role, shard)

          if pool_config
            pool_config.disconnect!
            pool_config.db_config
          end
        end
      end