style: remove unused vars, and add tests for them

Author: btry

RoboFilePlugin.php

@@ -207,7 +207,7 @@ public function codeCs(
 
       $strict = $options['strict'] ? '' : '-n';
 
-      $result = $this->taskExec("./vendor/bin/phpcs $csignore --standard=vendor/glpi-project/coding-standard/GlpiStandard/ {$strict} {$file}")->run();
+      $result = $this->taskExec("./vendor/bin/phpcs $csignore --standard=vendor/glpi-project/coding-standard/GlpiStandard/ --standard=tests/rulest.xml {$strict} {$file}")->run();
 
       if (!$result->wasSuccessful()) {
          if (!$options['autofix'] && !$options['no-interaction']) {

composer.json

@@ -24,7 +24,9 @@
       "glpi-project/tools": "^0.1.0",
       "glpi-project/coding-standard": "0.7.1",
       "atoum/reports-extension": "^3.0",
-      "jakub-onderka/php-parallel-lint": "^1.0"
+      "jakub-onderka/php-parallel-lint": "^1.0",
+      "dealerdirect/phpcodesniffer-composer-installer": "^0.5.0",
+      "sirbrillig/phpcs-variable-analysis": "^2.7"
     },
     "autoload-dev": {
         "psr-4": {