packaging: clean post-install script

Cleaned all the dead code in debian/ubuntu post install script.

Change-Id: Idb23b5974e544d704ee9feb753990bf185575ec5

extras/packaging/gnu-linux/debian/postinst

@@ -5,11 +5,7 @@ umask 022
 
 main() {
     mkdir -p /etc/dhtnet
-    # disabled because is shouldn't create key on behalf of user:
-    # create_key_pair_if_not_exist()
 
-    # disabled because we now use systemd preset system to disabled by default:
-    # disable_dnc_service
     echo "===================="
     echo "dnc server installed."
     echo "To configure your dnc client and/or server, run:"
@@ -21,27 +17,4 @@ main() {
     echo "===================="
 }
 
-# reload_dnc_service() {
-#     status=$(systemctl is-active dnc.service || true)
-#     if [ "$status" = "failed" ]; then
-#         echo "dnc.service failed to start, try a restart after keys was created..."
-#         systemctl restart dnc.service
-#     fi
-# }
-
-# disable_dnc_service() {
-#     systemctl stop dnc.service
-#     systemctl disable dnc.service
-# }
-
-# create_key_pair_if_not_exist() {
-#     mkdir -p /etc/dhtnet/id
-#     mkdir -p /etc/dhtnet/CA
-#     if [ ! -f /etc/dhtnet/id/id-server.crt ] && [ ! -f /etc/dhtnet/id/id-server.pem ]; then
-#         echo "Generating server keys..."
-#         dhtnet-crtmgr --setup -o /etc/dhtnet/
-#         dhtnet-crtmgr -a -c /etc/dhtnet/id/id-server.crt -p /etc/dhtnet/id/id-server.pem
-#     fi
-# }
-
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