To uninstall libboost-graph1.55.0 just follow these instructions.
sudo apt-get remove libboost-graph1.55.0
This will remove just the libboost-graph1.55.0 package itself.
sudo apt-get remove --auto-remove libboost-graph1.55.0
This will remove the libboost-graph1.55.0 package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for libboost-graph1.55.0 then this will work.
sudo apt-get purge libboost-graph1.55.0
Or similarly, like this libboost-graph1.55.0
sudo apt-get purge --auto-remove libboost-graph1.55.0
|Maintainer||Debian Boost Team <email@example.com>|
|Description||generic graph components and algorithms in C++|