How to delete mail id in fb login page

I think there may be a bit of confusion here!

When you log in to Facebook using your email address and password, you are not actually deleting your email address. Instead, you are using your email address to authenticate your identity and access your Facebook account.

If you want to delete your Facebook account, you can do so by following these steps:

  1. Go to your Facebook account settings by clicking on the downward arrow in the top right corner of the Facebook homepage and selecting "Settings" from the dropdown menu.
  2. Click on "Account Settings" from the menu on the left side of the page.
  3. Scroll down to the "Account" section and click on "Delete Account".
  4. Enter your password and confirm that you want to delete your account.
  5. Follow the prompts to complete the deletion process.

However, if you want to remove your email address from your Facebook login credentials, you can do so by following these steps:

  1. Go to your Facebook account settings by clicking on the downward arrow in the top right corner of the Facebook homepage and selecting "Settings" from the dropdown menu.
  2. Click on "Security" from the menu on the left side of the page.
  3. Scroll down to the "Login" section and click on "Edit" next to "Where you're logged in".
  4. Click on "Remove" next to the email address you want to remove.
  5. Confirm that you want to remove the email address.

Please note that removing an email address from your Facebook login credentials will not delete your Facebook account. It will only remove the email address as a login option.