Convert CheckConfigurationPermissions to $config

Signed-off-by: Kamil Tekiela <tekiela246@gmail.com>

phpstan-baseline.neon

@@ -603,12 +603,6 @@ parameters:
 			count: 1
 			path: src/Config.php
 
-		-
-			message: '#^Only booleans are allowed in a negated boolean, mixed given\.$#'
-			identifier: booleanNot.exprNotBoolean
-			count: 1
-			path: src/Config.php
-
 		-
 			message: '#^Only booleans are allowed in a negated boolean, string\|false given\.$#'
 			identifier: booleanNot.exprNotBoolean

psalm-baseline.xml

@@ -228,7 +228,6 @@
     </PropertyTypeCoercion>
     <RiskyTruthyFalsyComparison>
       <code><![CDATA[! $fileSize]]></code>
-      <code><![CDATA[! $this->get('CheckConfigurationPermissions')]]></code>
       <code><![CDATA[! ini_get('file_uploads')]]></code>
       <code><![CDATA[$cookieName]]></code>
       <code><![CDATA[$postSize]]></code>

src/Config.php

@@ -596,7 +596,7 @@ class Config
     public function checkPermissions(): void
     {
         // Check for permissions (on platforms that support it):
-        if (! $this->get('CheckConfigurationPermissions') || ! @file_exists($this->source)) {
+        if (! $this->config->CheckConfigurationPermissions || ! @file_exists($this->source)) {
             return;
         }