To uninstall speech-dispatcher-pico just follow these instructions.
sudo apt-get remove speech-dispatcher-pico
This will remove just the speech-dispatcher-pico package itself.
sudo apt-get remove --auto-remove speech-dispatcher-pico
This will remove the speech-dispatcher-pico package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for speech-dispatcher-pico then this will work.
sudo apt-get purge speech-dispatcher-pico
Or similarly, like this speech-dispatcher-pico
sudo apt-get purge --auto-remove speech-dispatcher-pico
|Maintainer||Debian TTS Team <email@example.com>|
|Description||Speech Dispatcher It supports various software and hardware speech synthesizers as backends and provides a generic layer for synthesizing speech and playing back PCM data via those different backends to applications.|