fix: use newline delimited protocol instead of octet counting

`rsyslog` marks that this is most common protocol and it is the only one
supported by them.

lib/logflare/backends/adaptor/tcp_adaptor/syslog.ex

@@ -2,10 +2,7 @@ defmodule Logflare.Backends.Adaptor.TCPAdaptor.Syslog do
   @moduledoc """
   Implementation of [RFC5424 The Syslog Protocol][]
 
-  This implementation uses *Octet Counting* framing from [RFC6587][]
-
   [RFC5424]: https://www.rfc-editor.org/rfc/rfc5424
-  [RFC6587]: https://www.rfc-editor.org/rfc/rfc6587#section-3.4.1
   """
 
   alias Logflare.LogEvent
@@ -14,18 +11,14 @@ defmodule Logflare.Backends.Adaptor.TCPAdaptor.Syslog do
   @pen 2137
 
   def format(%LogEvent{} = le, options) do
-    body = [
+    [
       header(le, options),
       " ",
       structured_data(le, options),
       " ",
       Jason.encode!(le.body),
       "\n"
     ]
-
-    len = IO.iodata_length(body)
-
-    [Integer.to_string(len), " ", body]
   end
 
   defp header(%LogEvent{} = le, options) do