$ sudo apt-get remove mongodb-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libgoogle-perftools4 libtcmalloc-minimal4 libv8-3.14.5 mongodb-clients
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
mongodb-server
0 upgraded, 0 newly installed, 1 to remove and 4 not upgraded.
After this operation, 16.2 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 81169 files and directories currently installed.)
Removing mongodb-server (1:2.4.9-1ubuntu1) ...
arg: remove
mongodb stop/waiting
Processing triggers for man-db (2.6.6-1) ...
Third last line looks like some debug that wasn't quashed.
Thanks Dave.
Marking this as Importance: Low since this doesn't appear to break anything.