refactor(elixir): remove telemetry id generation (#5084) (#5095)

Feel free to correct me if I'm wrong but it seems the telemetry id is
not longer used in Firezone 1.x
Removing this uuid generation would allow me to put the folder
`/var/firezone` as readonly instead of mounting a

[volume](367a46a5c8/firezone/values.yaml (L157))
to allow firezone to write inside. The folder `/var/firezone` seems to
be used only for this purpose

Maybe I should also remove

[this](49a965a686/elixir/Dockerfile (L293))
?

PS: I cannot find the contrib branch, but don't hesite to create it and
change the target branch of this PR

Co-authored-by: Antoine <antoinelabarussias@gmail.com>

elixir/Dockerfile

@@ -289,11 +289,6 @@ RUN set -xe \
     && adduser -s /bin/sh -u 1001 -G root -h /app -S -D default \
     && chown -R 1001:0 /app
 
-# Add other directories firezone needs to run
-RUN set -xe \
-    && mkdir -p /var/firezone \
-    && chown -R 1001:0 /var/firezone
-
 WORKDIR /app
 
 ARG APPLICATION_NAME

elixir/rel/overlays/bin/bootstrap

@@ -1,13 +1,3 @@
 #!/bin/sh
 
-mkdir -p /var/firezone
-
-setup_telemetry() {
-    [ -f /var/firezone/.tid ] || cat /proc/sys/kernel/random/uuid >/var/firezone/.tid
-    tid=$(cat /var/firezone/.tid)
-    export TELEMETRY_ID="$tid"
-}
-
-setup_telemetry
-
 cd -P -- "$(dirname -- "$0")" || exit 1