$ sudo apt-get remove php5-redis 

Uninstall php5-redis including dependent package

If you would like to remove php5-redis and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove php5-redis 

Use Purging php5-redis

If you use with purge options to php5-redis package all the configuration and dependent packages will be removed.

$ sudo apt-get purge php5-redis 

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 php5-redis 

See Also,