@LeifB73 probably not. You might save a little space in a database if the post is genuinely deleted, but many systems will “soft-delete” where a piece of data is marked as deleted so that it won’t appear in searches and lists, but is still there for record keeping.

Additionally, deleting old posts will just generate more work for a server to do, and if that deletion gets propagated to your followers then it could create more work on multiple instances.