SONAR-15776 Remove deprecation for 'Plugin-Dependencies' attribute

This reverts commit b77a664070

server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/PluginJarLoader.java

@@ -155,11 +155,6 @@ public class PluginJarLoader {
       return false;
     }
 
-    if (plugin.getType() != BUNDLED && !plugin.getRequiredPlugins().isEmpty()) {
-      LOG.warn("Use of 'Plugin-Dependencies' mechanism is planned for removal. Update the plugin {} [{}] to shade its dependencies instead.",
-        plugin.getName(), plugin.getKey());
-    }
-
     for (PluginInfo.RequiredPlugin requiredPlugin : plugin.getRequiredPlugins()) {
       PluginInfo installedRequirement = allPluginsByKeys.get(requiredPlugin.getKey());
       if (installedRequirement == null) {

server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginJarLoaderTest.java

@@ -194,16 +194,6 @@ public class PluginJarLoaderTest {
     assertThat(logs.logs()).contains("Plugin test [test] is ignored because entry point class is not defined");
   }
 
-  @Test
-  public void warn_if_external_plugin_has_dependencies() throws IOException {
-    copyTestPluginTo("test-base-plugin", fs.getInstalledExternalPluginsDir());
-    copyTestPluginTo("test-require-plugin", fs.getInstalledExternalPluginsDir());
-
-    underTest.loadPlugins();
-    assertThat(logs.logs()).contains("Use of 'Plugin-Dependencies' mechanism is planned for removal. "
-      + "Update the plugin Test Require Plugin [testrequire] to shade its dependencies instead.");
-  }
-
   @Test
   public void fail_if_external_plugin_has_same_key_has_bundled_plugin() throws IOException {
     File jar = createJar(fs.getInstalledExternalPluginsDir(), "plugin1", "main", null);