@rikmende Rick, I can't speak to stripping out your prior history of past posts, but I have used a quirky hack in the past to get around Facebook's save-for-later functionality which seems to be designed to keep you in Facebook 24/7. It'll work for your "saved" articles moving forward.

You can use this IFTTT recipe: https://ifttt.com/recipes/471081-read-it-later-on-facebook
To have it work, instead of bookmarking with Facebook's native interface, just repost/share the link/article you want to save to your own Facebook feed. If you don't want to share it with everyone, just mark the reshare as shared only with yourself and then only you would be able to see it. The IFTTT recipe will then strip the URL out of your shared post and push it to Pocket.

Note that if you POSSE to Facebook, you'll also see shared URLs for your own posts appear in Pocket from then on, but you can delete/mark as read all of those quickly enough. Or you can favorite them and push them to your public-facing Pocket shares (which are also subscribable) and consider them a form of POSSE to Pocket! Win-Win!