Remove ErrorTracker

Doesn't work with recent LiveView releases, and seems to be maintained
very slowly despite incoming PRs to fix the issues.

lib/music_library/application.ex

@@ -18,7 +18,6 @@ defmodule MusicLibrary.Application do
     children = [
       MusicLibrary.Vault,
       MusicLibrary.Repo,
-      MusicLibrary.ErrorRepo,
       MusicLibrary.BackgroundRepo,
       MusicLibraryWeb.Telemetry,
       {Oban, Application.fetch_env!(:music_library, Oban)},

lib/music_library/error_repo.ex

@@ -1,5 +0,0 @@
-defmodule MusicLibrary.ErrorRepo do
-  use Ecto.Repo,
-    otp_app: :music_library,
-    adapter: Ecto.Adapters.SQLite3
-end

lib/music_library_web/components/layouts/app.html.heex

@@ -98,15 +98,6 @@
             <.icon name="hero-chart-bar" class="h-4 w-4 mr-2" aria-hidden="true" data-slot="icon" />
             {gettext("Live Dashboard")}
           </.dropdown_link>
-          <.dropdown_link href={~p"/dev/errors"}>
-            <.icon
-              name="hero-exclamation-circle"
-              class="h-4 w-4 mr-2"
-              aria-hidden="true"
-              data-slot="icon"
-            />
-            {gettext("Errors")}
-          </.dropdown_link>
           <.dropdown_link href={~p"/dev/oban"}>
             <.icon name="hero-cog" class="h-4 w-4 mr-2" aria-hidden="true" data-slot="icon" />
             {gettext("Oban")}

lib/music_library_web/router.ex

@@ -89,19 +89,15 @@ defmodule MusicLibraryWeb.Router do
   end
 
   if Application.compile_env(:music_library, :monitoring_routes) do
-    use ErrorTracker.Web, :router
-
     import Phoenix.LiveDashboard.Router
 
     scope "/dev" do
       pipe_through [:browser, :logged_in]
 
-      error_tracker_dashboard("/errors")
-
       live_dashboard "/dashboard",
         metrics: MusicLibraryWeb.Telemetry,
         metrics_history: {MusicLibraryWeb.Telemetry.Storage, :metrics_history, []},
-        ecto_repos: [MusicLibrary.Repo, MusicLibrary.BackgroundRepo, MusicLibrary.ErrorRepo]
+        ecto_repos: [MusicLibrary.Repo, MusicLibrary.BackgroundRepo]
 
       oban_dashboard "/oban"
     end