Remove OpdaviesTalksServiceProvider

It's not used as the tests pass and functionality still works without
it.

web/modules/custom/talks/src/OpdaviesTalksServiceProvider.php

@@ -1,39 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Drupal\opdavies_talks;
-
-use Drupal\Core\DependencyInjection\ContainerBuilder;
-use Drupal\Core\DependencyInjection\ServiceProviderInterface;
-use Symfony\Component\DependencyInjection\Definition;
-use Symfony\Component\Finder\Finder;
-
-final class OpdaviesTalksServiceProvider implements ServiceProviderInterface {
-
-  public function register(ContainerBuilder $container): void {
-    foreach (['EventSubscriber', 'Repository', 'Service'] as $directory) {
-      $files = Finder::create()
-        ->in(__DIR__ . '/' . $directory)
-        ->files()
-        ->name('*.php');
-
-      foreach ($files as $file) {
-        $class = 'Drupal\opdavies_talks\\' . $directory . '\\' .
-          str_replace('/', '\\', substr($file->getRelativePathname(), 0, -4));
-
-        if ($container->hasDefinition($class)) {
-          continue;
-        }
-
-        $definition = new Definition($class);
-        $definition->setAutowired(TRUE);
-        if ($directory == 'EventSubscriber') {
-          $definition->addTag('event_subscriber');
-        }
-        $container->setDefinition($class, $definition);
-      }
-    }
-  }
-
-}