Fix violations of a handful of Error Prone checks (#5519)

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

core/src/main/java/hudson/PluginStrategy.java

@@ -70,8 +70,6 @@ public interface PluginStrategy extends ExtensionPoint {
 	/**
 	 * Optionally start services provided by the plugin. Should be called
 	 * when all plugins are loaded.
-	 * 
-	 * @param plugin
 	 */
 	void initializeComponents(PluginWrapper plugin);