Remove the display method and its test.

Author: drupol

spec/drupol/phptree/tests/TestGraphVizSpec.php

@@ -78,26 +78,4 @@ public function it_can_create_a_graph()
             ->render($tree)
             ->shouldReturn($result . PHP_EOL);
     }
-
-    public function it_can_display()
-    {
-        $visitor = new BreadthFirstVisitor();
-        $graph = new Graph();
-        $graphviz = new GraphViz();
-
-        $this->beConstructedWith($visitor, $graph, $graphviz);
-
-        $tree = new ValueNode('root', 2);
-
-        $nodes = [];
-        foreach (\range('A', 'F') as $letter) {
-            $nodes[] = new ValueNode($letter, 2);
-        }
-
-        $tree->add(...$nodes);
-
-        $this
-            ->display($tree)
-            ->shouldReturn($this);
-    }
 }

src/Render/GraphViz.php

@@ -79,18 +79,6 @@ public function getGraph(NodeInterface $node): Graph
         return $this->graph;
     }
 
-    /**
-     * @param \drupol\phptree\Node\NodeInterface $node
-     *
-     * @return $this
-     */
-    public function display(NodeInterface $node): RendererInterface
-    {
-        $this->graphviz->display($this->getGraph($node));
-
-        return $this;
-    }
-
     /**
      * @param \drupol\phptree\Node\NodeInterface $node
      *