Note
Deleting a plan from your device does not remove any results that may have been created using it.
Step One
Click to enlarge
Touch on the pencil icon as shown in the image to modify an existing plan.
Step Two
Click to enlarge
Touch the remove icon as shown at 
next to the name of the plan you would like to remove from your device.
Step Three
Click to enlarge
You will be asked to confirm your action. Touch OK to continue and delete the plan.