minor #20479 [Workflow] Removed private Definition::addPlaces (Nyholm)

This PR was merged into the 3.2-dev branch.

Discussion
----------

[Workflow] Removed private Definition::addPlaces

| Q             | A
| ------------- | ---
| Branch?       | "master"
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

There is no need for this method

Commits
-------

c546857 Removed private Definition::addPlaces

src/Symfony/Component/Workflow/Definition.php

@@ -32,11 +32,15 @@ final class Definition
      */
     public function __construct(array $places, array $transitions, $initialPlace = null)
     {
-        $this->addPlaces($places);
-        $this->setInitialPlace($initialPlace);
+        foreach ($places as $place) {
+            $this->addPlace($place);
+        }
+
         foreach ($transitions as $transition) {
             $this->addTransition($transition);
         }
+
+        $this->setInitialPlace($initialPlace);
     }
 
     /**
@@ -89,13 +93,6 @@ private function addPlace($place)
         $this->places[$place] = $place;
     }
 
-    private function addPlaces(array $places)
-    {
-        foreach ($places as $place) {
-            $this->addPlace($place);
-        }
-    }
-
     private function addTransition(Transition $transition)
     {
         $name = $transition->getName();