Expressions (phrases, clauses, etc.), Ichidan verb
to feel relieved of one's burden; to have a weight removed from one's mind
Idiomatic expression
これで肩の荷がおりました。It's like a weight has been lifted from my shoulders.
Also written 肩の荷がおりる【かたのにがおりる】、肩の荷が降りる【かたのにがおりる】、肩のにがおりる【かたのにがおりる】