Removed comments that only shows steps

This steps was only helpful while implementing the algorithm. And could be useful while comparing with the W3C specification, but they take up too much space.

src/MicrodataDOMElement.php

@@ -6,15 +6,12 @@ class MicrodataDOMElement extends \DOMElement
 {
     public function getProperties()
     {
-        // Step 1
         $results = [];
         $memory = [];
         $pending = [];
 
-        // Step 2
         $memory[] = $this;
 
-        // Step 3
         if ($this->hasChildNodes()) {
             $childNodes = iterator_to_array($this->childNodes);
 
@@ -25,7 +22,6 @@ class MicrodataDOMElement extends \DOMElement
             $pending = array_merge($pending, $childNodes);
         }
 
-        // Step 4
         if ($this->hasAttribute('itemref')) {
             $tokens = preg_split('/\s+/', $this->getAttribute('itemref'));
 
@@ -34,17 +30,9 @@ class MicrodataDOMElement extends \DOMElement
             }
         }
 
-        // Step 5
         while ($pending) {
-            // Step 6
             $current = array_pop($pending);
 
-            // Step 7
-            // in_array can't compare objects
-            /*if (in_array($current, $memory)) {
-                // There is MicrodataError
-                continue;
-            }*/
             $error = false;
 
             foreach ($memory as $memory_item) {
@@ -59,10 +47,8 @@ class MicrodataDOMElement extends \DOMElement
                 continue;
             }
 
-            // Step 8
             $memory[] = $current;
 
-            // Step 9
             if (! $current->hasAttribute('itemscope')) {
                 if ($current->hasChildNodes()) {
                     $childNodes = iterator_to_array($current->childNodes);
@@ -75,32 +61,23 @@ class MicrodataDOMElement extends \DOMElement
                 }
             }
 
-            // Step 10
             if ($current->hasAttribute('itemprop') && /* hasPropertyNames */ $current->getPropertyNames()) {
                 $results[] = $current;
             }
-
-            // Step 11: Return to loop
         }
 
-        // Step 12: End of loop. Sort results in tree order.
-
         $results = array_reverse($results);
 
-        // Step 13
         return $results;
     }
 
     public function getPropertyNames()
     {
-        // Step 1
         $itemprop = $this->getAttribute('itemprop');
         $tokens = $itemprop ? preg_split('/\s+/', $itemprop) : [];
 
-        // Step 2
         $properties = [];
 
-        // Step 3
         foreach ($tokens as $token) {
             if ($this->isAbsoluteUri($token)) {
                 $properties[] = $token;