Remove some unnecessary function_exists() checks and some minor improvements
diff --git a/system/helpers/path_helper.php b/system/helpers/path_helper.php
index 1341054..fec4a1a 100644
--- a/system/helpers/path_helper.php
+++ b/system/helpers/path_helper.php
@@ -55,7 +55,7 @@
 		}
 
 		// Resolve the path
-		if (function_exists('realpath') && @realpath($path) !== FALSE)
+		if (@realpath($path) !== FALSE)
 		{
 			$path = realpath($path);
 		}