Acrobat has the feature to remove XMP, and you have to remove nodes one by one, with my Batch XMP Remover, you can remove all XMP data of the PDF files from the given folder with the help of Acrobat API.
I will release this product recently.
P.S.
Adobe’s Extensible Metadata Platform (XMP) is a labeling technology that allows you to embed data about a file, known as metadata, into the file itself. With XMP, desktop applications and back-end publishing systems gain a common method for capturing, sharing, and leveraging this valuable metadata — opening the door for more efficient job processing, workflow automation, and rights management, among many other possibilities. With XMP, Adobe has taken the “heavy lifting” out of metadata integration, offering content creators an easy way to embed meaningful information about their projects and providing industry partners with standards-based building blocks to develop optimized workflow solutions.