You could simply try to unlink the file even if it does not exist: 
for my $file (qw(files.txt data.txt)) {
    unlink $file;
    die "Unable to unlink '$file': $!" if -e $file;
}

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In reply to Re: Unlinking a file when the file doesnt exist by moritz
in thread Unlinking a file when the file doesnt exist by Anonymous Monk

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