chore(portal): remove priv/Caddyfile (#10708)

This was from an earlier time and is no longer relevant.

elixir/Dockerfile

@@ -244,7 +244,6 @@ RUN cd apps/web \
 
 # Tailwind needs assets and app directories to look for used classes,
 # so we can't optimize further at this stage
-COPY priv priv
 COPY apps apps
 
 # Install pipeline and compile assets for Web app

elixir/priv/Caddyfile

@@ -1,16 +0,0 @@
-localhost {
-  log
-
-  reverse_proxy * firezone:13000
-
-  encode gzip
-
-  tls internal
-}
-
-:8443 {
-  handle /hello {
-    respond "HELLO
-"
-  }
-}