In order to remove applications, you will have to use the Google Play Store - much like when you installed them.
Start by going to your Home menu by pressing the HOME button on your remote control.
Then, scroll down to the Apps shelf and select the Store - Google Play icon
You will then be taken to Google's applications store: Google Play, where you can browse for applications and uninstall the ones which are already installed. Just select an app to be deleted, and then select Uninstall.
- Some of the pre-installed applications cannot be deleted
The screenshots provided here are for reference only. The actual screen might differ slightly according to your country, model or firmware version.