Or the file could be read and written in one action, and the deletion can be handled by a simple substitution.

  #! /usr/bin/perl -w
  use strict;

  my $valueToDelete = "two 222 sld";

  my $content = '';
  open my $fh, 'oldfile' || die $!;
  do {local $/; $content = <$fh>};
  close $fh;

  $content =~ s/^$valueToDelete\n//m;

  open $fh, '>newfile' || die $!;
  print $fh $content;
  close $fh;
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