Filter to strip unnecessary attributes

I’m looking for a concise PHP filter to add to my functions.php that will search for and strip the following attributes I don’t want in my theme output:

– rel=”attachment”
– rel=”attachment wp-att-{x}”
– rel=”category”
– rel=”category tag”
– rel=”bookmark”
– rel=”author”
– pubdate

I’m happy for all “rel” attributes to be stripped (rather than just what’s listed above) if that’s easier.