doc: remove unnecessary statement of web storage

For now, web storage is enabled by default.

Refs: #57666
PR-URL: #60363
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>

Author: deokjinkim

doc/api/globals.md

@@ -1105,8 +1105,7 @@ added: v0.0.1
 added: v22.4.0
 -->
 
-> Stability: 1.0 - Early development. Enable this API with the
-> \[`--experimental-webstorage`]\[] CLI flag.
+> Stability: 1.0 - Early development.
 
 A browser-compatible implementation of {Storage}. Disable this API with the
 [`--no-webstorage`][] (or its alias `--no-experimental-webstorage`) CLI flag.