minor #29031 SCA: minor code tweaks (kalessil)

This PR was merged into the 4.1 branch.

Discussion
----------

SCA: minor code tweaks

| Q             | A
| ------------- | ---
| Branch?       | 4.1
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Removed unused variables

Commits
-------

e4466bf4f0 SCA: removed unused variables

Author: nicolas-grekas

ContainerBuilder.php

@@ -1122,7 +1122,7 @@ private function createService(Definition $definition, array &$inlineServices, $
                 }
             }
         } else {
-            $r = new \ReflectionClass($class = $parameterBag->resolveValue($definition->getClass()));
+            $r = new \ReflectionClass($parameterBag->resolveValue($definition->getClass()));
 
             $service = null === $r->getConstructor() ? $r->newInstance() : $r->newInstanceArgs($arguments);
 

Loader/YamlFileLoader.php

@@ -782,7 +782,7 @@ private function checkDefinition($id, array $definition, $file)
     {
         if ($this->isLoadingInstanceof) {
             $keywords = self::$instanceofKeywords;
-        } elseif ($throw = (isset($definition['resource']) || isset($definition['namespace']))) {
+        } elseif (isset($definition['resource']) || isset($definition['namespace'])) {
             $keywords = self::$prototypeKeywords;
         } else {
             $keywords = self::$serviceKeywords;