refactor: custom json stringify not needed

src/stringifyJSON.ts

@@ -1,21 +0,0 @@
-import { addContextToErr } from "./err.js";
-import { objAsString } from "./objAsString.js";
-import { Err } from "./types.js";
-
-// jsonStringify is a replacement for JSON.stringify that returns an error
-// rather than throwing.
-function jsonStringify(obj: any): [string, Err] {
-  try {
-    const str = JSON.stringify(obj, (_, v) => {
-      if (typeof v === "bigint") {
-        return Number(v);
-      }
-      return v;
-    });
-    return [str, null];
-  } catch (err) {
-    return ["", addContextToErr(objAsString(err), "unable to stringify object")];
-  }
-}
-
-export { jsonStringify };