--- configure.orig	2011-08-27 20:52:18.000000000 +0900
+++ configure	2011-08-27 20:53:47.000000000 +0900
@@ -40,16 +40,6 @@
   exit 1
 fi
 
-# Check encoding filter
-if CHECK_COMMAND qkc ; then
-  PROGRAM_ENCODEFILTER="qkc -q -u"
-elif CHECK_COMMAND nkf ; then
-  PROGRAM_ENCODEFILTER="nkf -x"
-else
-  echo "ERROR: Require qkc or nkf installed for encode filter."
-  exit 1
-fi
-
 # Check install program
 if test -x /usr/ucb/install ; then
   PROGRAM_INSTALL="/usr/ucb/install"