remove Interface-Suffix

Behavioral/NullObject/Logger.php

@@ -0,0 +1,12 @@
+<?php
+declare(strict_types=1);
+
+namespace DesignPatterns\Behavioral\NullObject;
+
+/**
+ * Key feature: NullLogger must inherit from this interface like any other loggers
+ */
+interface Logger
+{
+    public function log(string $str);
+}