[Workers] Update pricing.mdx (#23562)

Removing this spare one :::

Author: nenizera

src/content/docs/workers/platform/pricing.mdx

@@ -125,8 +125,6 @@ Usage models may be changed at the individual Worker level:
 
 Existing Workers will not be impacted when changing the default usage model. You may change the usage model for individual Workers without affecting your account-wide default usage model.
 
-:::
-
 ## Workers Logs
 
 <Render file="workers_logs_pricing" />