Remove the watcher server

It doesn't function in nerves and is very flaky to begin with, it's just
better to launch node or whatever outside of the beam.

mix.exs

@@ -59,7 +59,6 @@ defmodule Aino.MixProject do
     [
       {:credo, "~> 1.5", only: [:dev, :test]},
       {:elli, "~> 3.3"},
-      {:erlexec, "~> 1.0"},
       {:ex_doc, "~> 0.28.0", only: [:dev]},
       {:jason, "~> 1.2"},
       {:mime, "~> 2.0"}

mix.lock

@@ -3,7 +3,6 @@
   "credo": {:hex, :credo, "1.6.4", "ddd474afb6e8c240313f3a7b0d025cc3213f0d171879429bf8535d7021d9ad78", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2.8", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "c28f910b61e1ff829bffa056ef7293a8db50e87f2c57a9b5c3f57eee124536b7"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.25", "2024618731c55ebfcc5439d756852ec4e85978a39d0d58593763924d9a15916f", [:mix], [], "hexpm", "56749c5e1c59447f7b7a23ddb235e4b3defe276afc220a6227237f3efe83f51e"},
   "elli": {:hex, :elli, "3.3.0", "089218762a7ff3d20ae81c8e911bd0f73ee4ee0ed85454226d1fc6b4fff3b4f6", [:rebar3], [], "hexpm", "698b13b33d05661db9fe7efcba41b84825a379cce86e486cf6aff9285be0ccf8"},
-  "erlexec": {:hex, :erlexec, "1.19.1", "bdd10c4f6c5f3c5c9aa31f5293681b128fab4a25a750119ef07a65f376f3c2ce", [:rebar3], [], "hexpm", "03597ae9140b4e62009e94ba0a0bbf481560146069a90a3eacd32774ea348fd0"},
   "ex_doc": {:hex, :ex_doc, "0.28.3", "6eea2f69995f5fba94cd6dd398df369fe4e777a47cd887714a0976930615c9e6", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "05387a6a2655b5f9820f3f627450ed20b4325c25977b2ee69bed90af6688e718"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "jason": {:hex, :jason, "1.3.0", "fa6b82a934feb176263ad2df0dbd91bf633d4a46ebfdffea0c8ae82953714946", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "53fc1f51255390e0ec7e50f9cb41e751c260d065dcba2bf0d08dc51a4002c2ac"},