Hello, ali badreldein ali elhussien 

    To remove the 'Daily Sale' button when cashier close session, please follow below steps.

        1) Create a Module, after that create a folder structure of xml file as shown in below image.

        2) Register the pos assets in __manifest__.py file.

        3) In 'closing_popup.xml' file add below code snippet.

  /////Code in Comment

        4) Do not forget to replace 'your_module_name' to Actual module name.

        5) Below is the screenshot of expected Output :

          

I Hope this information proves helpful to you.

Thanks & Regards,

Email:   odoo@aktivsoftware.com           

Skype: kalpeshmaheshwari