Select the element, the look for the interactions panel along the right side of the screen. you can remove the interactions you added there.
Click the name of the action you want to remove, and then click the little trash can icon (right next to the + Add Action button) at the bottom of the Timelines panel. This works similar for Interactions-- click the name of the Interaction you want to remove, then click the little trash icon at the bottom of the Interactions panel.
Does that help?