fixing phpstan complaint

Author: brettmc

tests/Unit/Context/ScopeTest.php

@@ -116,7 +116,7 @@ public function test_scope_local_storage_is_preserved_between_attach_and_scope()
         $scope['key'] = 'value';
         $scope = $storage->scope();
         $this->assertNotNull($scope);
-        $this->assertArrayHasKey('key', $scope); /** @phpstan-ignore-line */
+        $this->assertArrayHasKey('key', $scope);
         $this->assertSame('value', $scope['key']);
 
         unset($scope['key']);