我正在运行以下命令：
sudo apt-get remove mongodb
它给出了这个输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'mongodb' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
但是 mongodb 仍然安装在我的 Ubuntu 13.04 系统上，那么我该如何卸载它..？