To hide the points and Tiers in the details panel on the side of the Leaderboard, simply make sure ‘Show the gamification panel’ is not ticked when creating, editing or cloning a Leaderboard.
The "Show the gamification panel" option is available on the Styles page.

This will hide the details panel for your leaderboard ( You can visually see the effect when you have check / unchecked this option in the live preview on the right while editing / creating a leaderboard. )
The other place that you can hide the Points is the Player Profile screen ( Tale Of The Tape).