Use constructor property promotion in module WeeeGraphQl

Replace allmost all properties with constructor property promotion in module WeeeGraphQl:
https://stitcher.io/blog/constructor-promotion-in-php-8

* Readable code
* Make Magento less complex by removing properties which take up a lot of lines.
* Imported all classes to make code more readable.
I think the code would be a lot cleaner if all modules start using constructor promotions, since of 2.4.6 php 7.4 is dropped we can now make use of it. So let's start on it right now :).

Author: l-helmus-youwe

app/code/Magento/WeeeGraphQl/Model/Resolver/FixedProductTax.php

@@ -21,24 +21,14 @@
  */
 class FixedProductTax implements ResolverInterface
 {
-    /**
-     * @var Data
-     */
-    private $weeeHelper;
-
-    /**
-     * @var TaxHelper
-     */
-    private $taxHelper;
-
     /**
      * @param Data $weeeHelper
      * @param TaxHelper $taxHelper
      */
-    public function __construct(Data $weeeHelper, TaxHelper $taxHelper)
-    {
-        $this->weeeHelper = $weeeHelper;
-        $this->taxHelper = $taxHelper;
+    public function __construct(
+        private Data $weeeHelper,
+        private TaxHelper $taxHelper
+    ) {
     }
 
     /**

app/code/Magento/WeeeGraphQl/Model/Resolver/Quote/FixedProductTax.php

@@ -21,24 +21,14 @@
  */
 class FixedProductTax implements ResolverInterface
 {
-    /**
-     * @var Data
-     */
-    private $weeeHelper;
-
-    /**
-     * @var TaxHelper
-     */
-    private $taxHelper;
-
     /**
      * @param Data $weeeHelper
      * @param TaxHelper $taxHelper
      */
-    public function __construct(Data $weeeHelper, TaxHelper $taxHelper)
-    {
-        $this->weeeHelper = $weeeHelper;
-        $this->taxHelper = $taxHelper;
+    public function __construct(
+        private Data $weeeHelper,
+        private TaxHelper $taxHelper
+    ) {
     }
 
     /**

app/code/Magento/WeeeGraphQl/Model/Resolver/StoreConfig.php

@@ -36,16 +36,6 @@ class StoreConfig implements ResolverInterface
         WeeeDisplayConfig::DISPLAY_EXCL => 'EXCLUDE_FPT_WITHOUT_DETAILS'
     ];
 
-    /**
-     * @var Data
-     */
-    private $weeeHelper;
-
-    /**
-     * @var TaxHelper
-     */
-    private $taxHelper;
-
     /**
      * @var array
      */
@@ -55,10 +45,10 @@ class StoreConfig implements ResolverInterface
      * @param Data $weeeHelper
      * @param TaxHelper $taxHelper
      */
-    public function __construct(Data $weeeHelper, TaxHelper $taxHelper)
-    {
-        $this->weeeHelper = $weeeHelper;
-        $this->taxHelper = $taxHelper;
+    public function __construct(
+        private Data $weeeHelper,
+        private TaxHelper $taxHelper
+    ) {
     }
 
     /**

app/code/Magento/WeeeGraphQl/registration.php

@@ -6,4 +6,8 @@
 
 use Magento\Framework\Component\ComponentRegistrar;
 
-ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Magento_WeeeGraphQl', __DIR__);
+ComponentRegistrar::register(
+    ComponentRegistrar::MODULE,
+    'Magento_WeeeGraphQl',
+    __DIR__
+);