Updated docs in prom_ex module

lib/pinchflat/prom_ex.ex

@@ -1,55 +1,6 @@
 defmodule Pinchflat.PromEx do
   @moduledoc """
-  Be sure to add the following to finish setting up PromEx:
+  Configuration for the PromEx library which provides Prometheus metrics
-
-  1. Update your configuration (config.exs, dev.exs, prod.exs, releases.exs, etc) to
-     configure the necessary bit of PromEx. Be sure to check out `PromEx.Config` for
-     more details regarding configuring PromEx:
-     ```
-     config :pinchflat, Pinchflat.PromEx,
-       disabled: false,
-       manual_metrics_start_delay: :no_delay,
-       drop_metrics_groups: [],
-       grafana: :disabled,
-       metrics_server: :disabled
-     ```
-
-  2. Add this module to your application supervision tree. It should be one of the first
-     things that is started so that no Telemetry events are missed. For example, if PromEx
-     is started after your Repo module, you will miss Ecto's init events and the dashboards
-     will be missing some data points:
-     ```
-     def start(_type, _args) do
-       children = [
-         Pinchflat.PromEx,P
-
-         ...
-       ]
-
-       ...
-     end
-     ```
-
-  3. Update your `endpoint.ex` file to expose your metrics (or configure a standalone
-     server using the `:metrics_server` config options). Be sure to put this plug before
-     your `Plug.Telemetry` entry so that you can avoid having calls to your `/metrics`
-     endpoint create their own metrics and logs which can pollute your logs/metrics given
-     that Prometheus will scrape at a regular interval and that can get noisy:
-     ```
-     defmodule PinchflatWeb.Endpoint do
-       use Phoenix.Endpoint, otp_app: :pinchflat
-
-       ...
-
-       plug PromEx.Plug, prom_ex_module: Pinchflat.PromEx
-
-       ...
-     end
-     ```
-
-  4. Update the list of plugins in the `plugins/0` function return list to reflect your
-     application's dependencies. Also update the list of dashboards that are to be uploaded
-     to Grafana in the `dashboards/0` function.
   """
 
   use PromEx, otp_app: :pinchflat
@@ -71,7 +22,6 @@ defmodule Pinchflat.PromEx do
   @impl true
   def dashboard_assigns do
     [
-      # datasource_id: "prometheus",
       default_selected_interval: "30s"
     ]
   end