Motivation

In osm-auth.mjs at line 578-583, checks Web Crypto API supporting.
I think this code no need because of following 2 reasons.

1. All of modern browsers are supporting Web Crypto API. (See MDN)
2. Node.js supports Web Crypto API since Node 20, but this function always returns false because window object is not defined on Node.js.

Proposal

Remove Web Crypto API support checking code and Web Crypto API is called from globalThis object.