Remove URI filter for parenthesis and dollar symbols, as talked in #47.

Signed-off-by: Razican <admin@razican.com>
diff --git a/system/core/URI.php b/system/core/URI.php
index 1817374..7809e17 100644
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -326,13 +326,6 @@
 		{
 			show_error('The URI you submitted has disallowed characters.', 400);
 		}
-
-		// Convert programatic characters to entities and return
-		return str_replace(
-			array('$',     '(',     ')',     '%28',   '%29'),	// Bad
-			array('&#36;', '&#40;', '&#41;', '&#40;', '&#41;'),	// Good
-			$str
-		);
 	}
 
 	// --------------------------------------------------------------------