[CLEANUP] Avoid magic method forwarding in Import (#1156)

Part of #1147

Author: oliverklee

config/phpstan-baseline.neon

@@ -90,12 +90,6 @@ parameters:
 			count: 1
 			path: ../src/Property/Charset.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:comments\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/Property/Import.php
-
 		-
 			message: '#^Only booleans are allowed in an if condition, string given\.$#'
 			identifier: if.condNotBoolean

src/Property/Import.php

@@ -82,7 +82,7 @@ public function __toString(): string
 
     public function render(OutputFormat $outputFormat): string
     {
-        return $outputFormat->comments($this) . '@import ' . $this->location->render($outputFormat)
+        return $outputFormat->getFormatter()->comments($this) . '@import ' . $this->location->render($outputFormat)
             . ($this->mediaQuery === null ? '' : ' ' . $this->mediaQuery) . ';';
     }