Remove the wp_is_trusted_network() function pending further discussion on terminology and behaviour.

See #30145


git-svn-id: https://develop.svn.wordpress.org/trunk@30577 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/ms-functions.php

@@ -2435,14 +2435,3 @@ function wp_get_sites( $args = array() ) {
 
 	return $site_results;
 }
-
-/**
- * Determine if the current network should be treated as a trusted network.
- *
- * @since 4.1.0
- *
- * @return bool False.
- */
-function wp_is_trusted_network() {
-	return false;
-}