Fix relation and try to implement delete

src/Service/SnipContent/SnipContentService.php

@@ -101,6 +101,8 @@ readonly class SnipContentService
 
     public function delete(Snip $snip): void
     {
-        // Cleanup the versions
+        foreach ($snip->getSnipContents() as $snipContent) {
+            $this->em->remove($snipContent);
+        }
     }
 }