Remove a stray 'use blib' line

This was fixed upstream in 1.414.

Bug-Debian: https://bugs.debian.org/785502
--- libi18n-charset-perl.orig/lib/I18N/Charset.pm
+++ libi18n-charset-perl/lib/I18N/Charset.pm
@@ -9,7 +9,6 @@
 require 5.005;
 
 use base 'Exporter';
-use blib;
 use Carp;
 
 =head1 NAME
