lib: removed unused variable

This change removes a variable that is not being used in the file.

PR-URL: #23497
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Guy Bedford <guybedford@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: Long Nguyen

lib/internal/url.js

@@ -458,7 +458,7 @@ Object.defineProperties(URL.prototype, {
           if (ctx.path.length > 0) {
             try {
               return (new URL(ctx.path[0])).origin;
-            } catch (err) {
+            } catch {
               // fall through... do nothing
             }
           }