config/locales: Remove incorrect distinction

Author: grtcdr

src/config/locales.md

@@ -19,8 +19,7 @@ To enable a certain locale, un-comment or add the relevant lines in
 
 ## Setting the system language
 
-Set `LANG=xxxx` in `/etc/locale.conf`, this applies to `glibc` and `musl`
-although it's not required by the latter.
+Set `LANG=xxxx` in `/etc/locale.conf`.
 
 ## Application locale