src/Routing/Routes.php | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/Routing/Routes.php b/src/Routing/Routes.php
index 0c93cfd..08dd13f 100644
--- a/src/Routing/Routes.php
+++ b/src/Routing/Routes.php
@@ -132,9 +132,6 @@ class Routes implements ContainerInjectionInterface {
     // All routes serve only the JSON:API media type.
     $routes->addRequirements(['_format' => 'api_json']);
 
-    // Require the JSON:API media type header on every route.
-    $routes->addRequirements(['_content_type_format' => 'api_json']);
-
     return $routes;
   }