Deprecate is_site_admin. Props nacin. see #11644

git-svn-id: https://develop.svn.wordpress.org/trunk@12645 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/ms-functions.php

@@ -183,30 +183,6 @@ function get_current_user_id() {
 	return $current_user->ID;
 }
 
-/**
- * Determine if user is a site admin.
- *
- * @deprecated Use {@link is_keymaster()}
- *
- */
-function is_site_admin( $user_login = '' ) {
-	// This function must reside in a file included only if is_multsite() since many plugins
-	// test for its existence to determine if multisite is enabled.
-
-	if ( empty($user_login) ) {
-		$user_id = get_current_user_id();
-		if ( !$user_id )
-			return false;
-	} else {
-		$user = new WP_User(null, $user_login);
-		if ( empty($user->id) )
-			return false;
-		$user_id = $user->id;
-	}
-
-	return is_super_admin($user_id);
-}
-
 /**
  * Retrieve option value based on setting name and blog_id.
  *