debug: use internal/url

Author: bcoe

lib/internal/source_map/source_map_cache.js

@@ -14,7 +14,6 @@ const {
 } = primordials;
 
 const MapIteratorNext = uncurryThis(MapPrototypeEntries(new Map()).next);
-const { URL } = require('internal/url');
 
 function ObjectGetValueSafe(obj, key) {
   const desc = ObjectGetOwnPropertyDescriptor(obj, key);
@@ -37,7 +36,7 @@ const cjsSourceMapCache = new WeakMap();
 // The esm cache is not exposed to users, so we can use a Map keyed
 // on filenames.
 const esmSourceMapCache = new Map();
-const { fileURLToPath, URL } = require('url');
+const { fileURLToPath, URL } = require('internal/url');
 let Module;
 let SourceMap;