Remove a couple of files that were accidentally introduced in the last commit

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

lib/plugin/meta.ex

@@ -1,37 +0,0 @@
-defmodule Omnibot.Plugin.Meta do
-  defmodule Hooks do
-    defmacro __before_compile(_env) do
-      quote do
-        def children(_cfg), do: []
-      end
-    end
-  end
-
-  defmacro __using__([]) do
-    quote do
-      use Omnibot.Plugin.Base
-      use Supervisor
-
-      @behaviour Omnibot.Plugin.Meta
-
-      ## Client API
-
-      def start_link(opts) do
-        Supervisor.start_link(opts)
-      end
-
-      ## Server callbacks
-      def init(opts) do
-        cfg = opts[:cfg]
-        children = children(cfg)
-        Supervisor.init(children, opts)
-      end
-
-      defoverridable Omnibot.Plugin.Meta
-
-      @before_compile Omnibot.Plugin.Meta.Hooks
-    end
-  end
-
-  @callback children(cfg :: any) :: [{atom(), [{atom(), any}]}]
-end

lib/plugin/supervisor.ex

@@ -1,40 +0,0 @@
-defmodule Omnibot.Plugin.Supervisor do
-  defmacro __using__(_opts) do
-    quote do
-      import Omnibot.Plugin.Supervisor
-      alias Omnibot.Plugin
-      use Supervisor
-
-      @behaviour Omnibot.Plugin.Supervisor
-
-      def start_link(opts) do
-        Supervisor.start_link(__MODULE__, opts[:cfg], opts)
-      end
-
-      def init(_cfg) do
-        Supervisor.init(children(), strategy: :one_for_one)
-      end
-
-    end
-  end
-
-  @callback children() :: [any]
-end
-
-# TODO :
-#   - figure out the best way to allow for including of supervisors and agents into a bot module
-#     - have to `use Agent` both places, this is not optimal
-#       - probably just lacks child_spec/1 ?
-#       - Do away with actual Plugin.Agent set of functions (outside of macro),
-#         and make it behaviours + `use Plugin.Agent` instead?
-# Allow for ergonomic supervisor declarations, maybe like:
-#
-# Plugin.supervisor [
-#   SomeAgent,
-#   SomeGenSever,
-#   SomeWorker,
-# ], strategy: one_for_all
-#
-#
-# And it implements all of the stuff for you? This may be too broad for how I'm doing things
-#   - rename MODULES to PLUGINS