Apply suggestions from @kske 2

client/src/main/java/envoy/client/data/commands/Callable.java

@@ -20,20 +20,4 @@ public interface Callable {
 	 * @since Envoy Client v0.2-beta
 	 */
 	void call(List<String> arguments);
-
-	/**
-	 * Performs the instance specific action when a {@link SystemCommand} has been
-	 * called and additionally enables the user to execute his own action once it
-	 * has been called.
-	 *
-	 * @param arguments        the arguments that should be passed to the
-	 *                         {@link SystemCommand}
-	 * @param additionalAction the action to perform when this system command has
-	 *                         been called
-	 * @since Envoy Client v0.2-beta
-	 */
-	default void call(List<String> arguments, Runnable additionalAction) {
-		call(arguments);
-		additionalAction.run();
-	}
 }