No longer use/support a local environment file

Cargo.toml

@@ -98,7 +98,6 @@ instead of a server that has high scalability."""
 section = "net"
 priority = "optional"
 assets = [
-  ["debian/env.local", "etc/matrix-conduit/local", "644"],
   ["debian/README.Debian", "usr/share/doc/matrix-conduit/", "644"],
   ["README.md", "usr/share/doc/matrix-conduit/", "644"],
   ["target/release/conduit", "usr/sbin/matrix-conduit", "755"],

debian/env.local

@@ -1,33 +0,0 @@
-# Conduit homeserver local configuration
-#
-# Conduit is an application based on the Rocket web framework.
-# Configuration of Conduit happens via Debconf (see the resulting config in
-# `/etc/matrix-conduit/debian`) and optionally by uncommenting and tweaking the
-# variables in this file below.
-
-# The maximum size of a Matrix HTTP requests in bytes.
-#
-# This mostly affects the size of files that can be downloaded/uploaded.
-# It defaults to 20971520 (20MB).
-#ROCKET_MAX_REQUEST_SIZE=20971520
-
-# Whether user registration is allowed.
-#
-# User registration is not disabled by default.
-#ROCKET_REGISTRATION_DISABLED=false
-
-# Whether encryption is enabled.
-#
-# (End-to-end) encryption is not disabled by default.
-#ROCKET_ENCRYPTION_DISABLED=false
-
-# Whether federation with other Matrix servers is enabled.
-#
-# Federation is not enabled by default; it is still experimental.
-#ROCKET_FEDERATION_ENABLED=false
-
-# The log level of the homeserver.
-#
-# The log level is "critical" by default.
-# Allowed values are: "off", "normal", "debug", "critical"
-#ROCKET_LOG="critical"