Delete a dynamically linked composition or clip (Production Premium or Master Collection only)

You can delete a linked composition from an Encore project if the composition isn’t used in the project. You can delete a linked composition from an Adobe Premiere Pro project at any time, even if the composition is used in a project.

You can delete linked clips, which are simply references to the linked composition in the Project panel, from the timeline of an Adobe Premiere Pro sequence or from an Encore menu or timeline at any time.