Upvote:2
Perhaps you'll find these suttas relevant.
AN 6.89 through AN 6.91 list six things that are given up, in order to become accomplished in view -- which include the first three fetters (which are abandoned by a stream-enterer).
Continuing in the same vein, AN 6.93 says,
A person accomplished in view can’t take conditions to be permanent, happiness, or self.
The word which Ven. Sujato translates there as "conditions" is "sankhara".
Or perhaps that doesn't answer the question, because it's not exactly "removing" sankharas.
On the subject of what might be "a sankhara to be removed", I suspect that identity-view is one example of a sankhara -- in the sense that it's "a fabrication" -- see the simile of the chariot.
Also AN 4.10 seems to warns against relishing and attaching to views in general:
And what is the attachment to views? It’s when you don’t truly understand views’ origin, ending, gratification, drawback, and escape. So greed, relishing, affection, infatuation, thirst, passion, attachment, and craving for views linger on inside.
Perhaps there's some controversy about abandoning views: "Does that mean, all views? What about Right View, surely that's not to be abandoned?" Perhaps that is (ironically) a kind of topic that may lead to differences of view or doctrine between different schools. I suppose that everyone agrees, though, that at least (among all views) "self-views" or "identity view" is to be abandoned by a stream enterer.