diff --git a/solid2fastq.pl b/solid2fastq.pl
deleted file mode 100755
index c60ad81..0000000
--- a/solid2fastq.pl
+++ /dev/null
@@ -1,111 +0,0 @@
-#!/usr/bin/perl -w
-
-# Author: lh3
-# Note: Ideally, this script should be written in C. It is a bit slow at present.
-# Also note that this script is different from the one contained in MAQ.
-
-use strict;
-use warnings;
-use Getopt::Std;
-
-my %opts;
-my $version = '0.1.4';
-my $usage = qq{
-Usage: solid2fastq.pl <in.title> <out.prefix>
-
-Note: <in.title> is the string showed in the `# Title:' line of a
-      ".csfasta" read file. Then <in.title>F3.csfasta is read sequence
-      file and <in.title>F3_QV.qual is the quality file. If
-      <in.title>R3.csfasta is present, this script assumes reads are
-      paired; otherwise reads will be regarded as single-end.
-
-      The read name will be <out.prefix>:panel_x_y/[12] with `1' for R3
-      tag and `2' for F3. Usually you may want to use short <out.prefix>
-      to save diskspace. Long <out.prefix> also causes troubles to maq.
-
-};
-
-getopts('', \%opts);
-die($usage) if (@ARGV != 2);
-my ($title, $pre) = @ARGV;
-my (@fhr, @fhw);
-my @fn_suff = ('F3.csfasta', 'F3_QV.qual', 'R3.csfasta', 'R3_QV.qual');
-my $is_paired = (-f "$title$fn_suff[2]" || -f "$title$fn_suff[2].gz")? 1 : 0;
-if ($is_paired) { # paired end
-  for (0 .. 3) {
-	my $fn = "$title$fn_suff[$_]";
-	$fn = "gzip -dc $fn.gz |" if (!-f $fn && -f "$fn.gz");
-	open($fhr[$_], $fn) || die("** Fail to open '$fn'.\n");
-  }
-  open($fhw[0], "|gzip >$pre.read2.fastq.gz") || die; # this is NOT a typo
-  open($fhw[1], "|gzip >$pre.read1.fastq.gz") || die;
-  open($fhw[2], "|gzip >$pre.single.fastq.gz") || die;
-  my (@df, @dr);
-  @df = &read1(1); @dr = &read1(2);
-  while (@df && @dr) {
-	if ($df[0] eq $dr[0]) { # mate pair
-	  print {$fhw[0]} $df[1]; print {$fhw[1]} $dr[1];
-	  @df = &read1(1); @dr = &read1(2);
-	} else {
-	  if ($df[0] le $dr[0]) {
-		print {$fhw[2]} $df[1];
-		@df = &read1(1);
-	  } else {
-		print {$fhw[2]} $dr[1];
-		@dr = &read1(2);
-	  }
-	}
-  }
-  if (@df) {
-	print {$fhw[2]} $df[1];
-	while (@df = &read1(1, $fhr[0], $fhr[1])) {
-	  print {$fhw[2]} $df[1];
-	}
-  }
-  if (@dr) {
-	print {$fhw[2]} $dr[1];
-	while (@dr = &read1(2, $fhr[2], $fhr[3])) {
-	  print {$fhw[2]} $dr[1];
-	}
-  }
-  close($fhr[$_]) for (0 .. $#fhr);
-  close($fhw[$_]) for (0 .. $#fhw);
-} else { # single end
-  for (0 .. 1) {
-	my $fn = "$title$fn_suff[$_]";
-	$fn = "gzip -dc $fn.gz |" if (!-f $fn && -f "$fn.gz");
-	open($fhr[$_], $fn) || die("** Fail to open '$fn'.\n");
-  }
-  open($fhw[2], "|gzip >$pre.single.fastq.gz") || die;
-  my @df;
-  while (@df = &read1(1, $fhr[0], $fhr[1])) {
-	print {$fhw[2]} $df[1];
-  }
-  close($fhr[$_]) for (0 .. $#fhr);
-  close($fhw[2]);
-}
-
-sub read1 {
-  my $i = shift(@_);
-  my $j = ($i-1)<<1;
-  my ($key, $seq);
-  my ($fhs, $fhq) = ($fhr[$j], $fhr[$j|1]);
-  while (<$fhs>) {
-	my $t = <$fhq>;
-	if (/^>(\d+)_(\d+)_(\d+)_[FR]3/) {
-	  $key = sprintf("%.4d_%.4d_%.4d", $1, $2, $3); # this line could be improved on 64-bit machines
-	  die(qq/** unmatched read name: '$_' != '$_'\n/) unless ($_ eq $t);
-	  my $name = "$pre:$1_$2_$3/$i";
-	  $_ = substr(<$fhs>, 2);
-	  tr/0123./ACGTN/;
-	  my $s = $_;
-	  $_ = <$fhq>;
-	  s/-1\b/0/eg;
-	  s/^(\d+)\s*//;
-	  s/(\d+)\s*/chr($1+33)/eg;
-	  $seq = qq/\@$name\n$s+\n$_\n/;
-	  last;
-	}
-  }
-  return defined($seq)? ($key, $seq) : ();
-}