Drop release_series_support_status from overview and status

This undocumented key used to use a simple date-based
formula and used to help support and the core
team.

Nodes no longer have the context to return
a correct response, so all we can do is drop this
key.

(cherry picked from commit 93fd1dc)
(cherry picked from commit c664af8)

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/status_command.ex

@@ -252,7 +252,6 @@ defmodule RabbitMQ.CLI.Ctl.Commands.StatusCommand do
       rabbitmq_version: Keyword.get(result, :rabbitmq_version) |> to_string,
       erlang_version: Keyword.get(result, :erlang_version) |> to_string |> String.trim_trailing(),
       crypto_lib_version: crypto_lib_version,
-      release_series_support_status: Keyword.get(result, :release_series_support_status, true),
       uptime: Keyword.get(result, :uptime),
       is_under_maintenance: Keyword.get(result, :is_under_maintenance, false),
       processes: Enum.into(Keyword.get(result, :processes), %{}),

deps/rabbitmq_management/src/rabbit_mgmt_wm_overview.erl

@@ -49,7 +49,6 @@ to_json(ReqData, Context = #context{user = User = #user{tags = Tags}}) ->
                  {cluster_name,              rabbit_nodes:cluster_name()},
                  {erlang_version,            erlang_version()},
                  {erlang_full_version,       erlang_full_version()},
-                 {release_series_support_status, rabbit_release_series:readable_support_status()},
                  {disable_stats,                 rabbit_mgmt_util:disable_stats(ReqData)},
                  {is_op_policy_updating_enabled, not rabbit_mgmt_features:is_op_policy_updating_disabled()},
                  {enable_queue_totals,           rabbit_mgmt_util:enable_queue_totals(ReqData)}],