my website was changed it is not showing when i deleted wp_head

I'm not sure what you mean. How did you delete wp_head? What exactly did you delete?

wp_head i added google adsense code after removing the code it looks like this without header file how to reload it it with header

Did you remove that through the theme's core file?

If so I would try re-installing it. Your settings will be fine.

Try using hooks next time for something like this:
https://docs.generatepress.com/article/hooks-overview/
https://docs.generatepress.com/article/wp-head/