You can uninstall or removes an installed blacs1-pvm package itself from Ubuntu 16.10 (Yakkety Yak) through the terminal,
$ sudo apt-get remove blacs1-pvm
If you would like to remove blacs1-pvm and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove blacs1-pvm
If you use with purge options to blacs1-pvm package all the configuration and dependent packages will be removed.
$ sudo apt-get purge blacs1-pvm
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove blacs1-pvm