minor symfony#40967 [Translation] [Loco] Remove SCHEME const (OskarStark)

This PR was merged into the 5.3-dev branch.

Discussion
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[Translation] [Loco] Remove SCHEME const

| Q             | A
| ------------- | ---
| Branch?       | 5.x
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

For consistency, we do it this way in mailer and notifier

cc `@welcoMattic`

Commits
-------

34be4a5 [Translation] [Loco] Remove SCHEME const

Author: derrabus

src/Symfony/Component/Translation/Bridge/Loco/LocoProvider.php

@@ -48,7 +48,7 @@ public function __construct(HttpClientInterface $client, LoaderInterface $loader
 
     public function __toString(): string
     {
-        return sprintf('%s://%s', LocoProviderFactory::SCHEME, $this->endpoint);
+        return sprintf('loco://%s', $this->endpoint);
     }
 
     public function write(TranslatorBagInterface $translatorBag): void

src/Symfony/Component/Translation/Bridge/Loco/LocoProviderFactory.php

@@ -26,7 +26,6 @@
  */
 final class LocoProviderFactory extends AbstractProviderFactory
 {
-    public const SCHEME = 'loco';
     private const HOST = 'localise.biz/api/';
 
     private $client;
@@ -47,8 +46,8 @@ public function __construct(HttpClientInterface $client, LoggerInterface $logger
      */
     public function create(Dsn $dsn): ProviderInterface
     {
-        if (self::SCHEME !== $dsn->getScheme()) {
-            throw new UnsupportedSchemeException($dsn, self::SCHEME, $this->getSupportedSchemes());
+        if ('loco' !== $dsn->getScheme()) {
+            throw new UnsupportedSchemeException($dsn, 'loco', $this->getSupportedSchemes());
         }
 
         $endpoint = sprintf('%s%s', 'default' === $dsn->getHost() ? self::HOST : $dsn->getHost(), $dsn->getPort() ? ':'.$dsn->getPort() : '');
@@ -64,6 +63,6 @@ public function create(Dsn $dsn): ProviderInterface
 
     protected function getSupportedSchemes(): array
     {
-        return [self::SCHEME];
+        return ['loco'];
     }
 }