I removed web part zone from page layout and deployed it using FEATURE. I see the web parts and zone removed from all existing pages using that page layout. However, I see following warning first time I open the page:
"One or more Web Parts on this page references a zone that doesn't exist. It has been moved to the Closed Web Parts Gallery."
This happens for first user only after that the warning does not display.
Is there any way I can get rid of this alert message so that when I deploy the change in production, customers do not see this message?