Move is_admin() to wp-settings.php so it's available when query.php is not included.

git-svn-id: http://svn.automattic.com/wordpress/trunk@12393 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/query.php

@@ -86,22 +86,6 @@ function wp_reset_query() {
  * Query type checks.
  */
 
-/**
- * Whether the current request is in WordPress admin Panel
- *
- * Does not inform on whether the user is an admin! Use capability checks to
- * tell if the user should be accessing a section or not.
- *
- * @since 1.5.1
- *
- * @return bool True if inside WordPress administration pages.
- */
-function is_admin () {
-	if ( defined('WP_ADMIN') )
-		return WP_ADMIN;
-	return false;
-}
-
 /**
  * Is query requesting an archive page.
  *