diff --git a/packages/client/src/components/devtools/DevToolsHeader.svelte b/packages/client/src/components/devtools/DevToolsHeader.svelte
index 24b2d11c72..a60cec8ce1 100644
--- a/packages/client/src/components/devtools/DevToolsHeader.svelte
+++ b/packages/client/src/components/devtools/DevToolsHeader.svelte
@@ -27,8 +27,6 @@
       value: "ADMIN",
     },
   ]
-
-  const isFullScreen = window.parent.isBuilder
 </script>
 
 <div class="dev-preview-header" class:mobile={$context.device.mobile}>