Cleaned up environment class variable which isn't used anymore in current implementation
diff --git a/system/core/Config.php b/system/core/Config.php
index ae91441..d6b97d7 100644
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -30,7 +30,6 @@
 
 	var $config = array();
 	var $is_loaded = array();
-	var $environment = ENVIRONMENT;
 	var $_config_paths = array(APPPATH);
 
 	/**