installer::download: Remove unused create_link_tree.

Change-Id: I2ec409d25ae46580898dda180d991554d89ee501
diff --git a/solenv/bin/modules/installer/download.pm b/solenv/bin/modules/installer/download.pm
index 7c4e23d..fb651a8 100644
--- a/solenv/bin/modules/installer/download.pm
+++ b/solenv/bin/modules/installer/download.pm
@@ -781,32 +781,6 @@ sub get_language_string_from_language_block
    return $newstring;
}

####################################################
# Creating link tree for upload
####################################################

sub create_link_tree
{
    my ($sourcedownloadfile, $destfilename, $versionstring) = @_;

    if ( ! $installer::globals::ooouploaddir ) { installer::exiter::exit_program("ERROR: Directory for LO upload not defined!", "create_link_tree"); }
    my $versiondir = $installer::globals::ooouploaddir . $installer::globals::separator . $versionstring;
    my $infoline = "Directory for the link: $versiondir\n";
    push(@installer::globals::logfileinfo, $infoline);

    if ( ! -d $versiondir ) { installer::systemactions::create_directory_structure($versiondir); }

    # inside directory $versiondir all links have to be created
    my $linkdestination = $versiondir . $installer::globals::separator . $destfilename;

    # If there is an older version of this file (link), it has to be removed
    if ( -f $linkdestination ) { unlink($linkdestination); }

    $infoline = "Creating hard link from $sourcedownloadfile to $linkdestination\n";
    push(@installer::globals::logfileinfo, $infoline);
    installer::systemactions::hardlink_one_file($sourcedownloadfile, $linkdestination);
}

#######################################################
# Setting supported platform for LibreOffice
# builds