Update README.md

Author: Javier Morant

README.md

@@ -28,19 +28,7 @@ const data = [{title: 'Node 1', items: [{title: 'Node 1.1'}, {title: 'Node 1.2'}
   data={data}
   getChildrenName={(node) => 'items'}
   onNodePressed={(node) => alert('Selected node')}
-  renderNode={(node, level) => (
-            <View
-              style={{
-                flex: 1,
-                padding: 10,
-                borderWidth: 1,
-                borderColor: 'rgb(0, 0, 0)',
-              }}
-            >
-              <Text>{node.title}</Text>
-            </View>
-    )
-  }
+  renderNode={(node, level) => <Text>{node.title}</Text>}
 />
 ```