Remove tests for the deprecated Dynamic Link component

The component has been deprecated by Google/Firebase. Accordingly,
the related code in this SDK will not be updated anymore. In general,
it wouldn't hurt to keep the tests, however they became more and more
brittle.

Author: jeromegamez

phpunit.xml.dist

@@ -22,5 +22,10 @@
         <include>
             <directory>src/Firebase</directory>
         </include>
+
+        <exclude>
+            <!-- The Dynamic Links Component ist deprecated and the tests are brittle -->
+            <directory>src/Firebase/DynamicLink</directory>
+        </exclude>
     </source>
 </phpunit>

src/Firebase/DynamicLink.php

@@ -14,6 +14,10 @@
 use function trim;
 
 /**
+ * @deprecated 7.14.0 Firebase Dynamic Links is deprecated and should not be used in new projects. The service will
+ *                     shut down on August 25, 2025. The component will remain in the SDK until then, but as the
+ *                     Firebase service is deprecated, this component is also deprecated
+ *
  * @see https://github.com/googleapis/google-api-nodejs-client/blob/main/src/apis/firebasedynamiclinks/v1.ts
  *
  * @phpstan-type DynamicLinkWarningShape array{

src/Firebase/Factory.php

@@ -441,6 +441,7 @@ public function createMessaging(): Contract\Messaging
      * @deprecated 7.14.0 Firebase Dynamic Links is deprecated and should not be used in new projects. The service will
      *                    shut down on August 25, 2025. The component will remain in the SDK until then, but as the
      *                    Firebase service is deprecated, this component is also deprecated
+     * @codeCoverageIgnore
      *
      * @see https://firebase.google.com/support/dynamic-links-faq Dynamic Links Deprecation FAQ
      *