Windows Edge not forgetting email address.

On one of my Windows 10 computers, I no longer want my email address associated with it. I did the following:

1- I signed out of the Microsoft account on my PC and logged in as a local account.

2- Under Email and Accounts, I deleted my email account shown in control panel. None show any longer.

3- All windows and credentials for windows and web were removed.

4- Signed out of edge.

5- Repaired and edge. (Microsoft does not allow an uninstall.)

6- Told control panel to stop automatically sign in.

Now when I start edge, a welcome screen shows. Edge wants you to sign in. It still shows the email address that I want my PC to forget. The profile won't delete. I created a second profile and switched to it hoping to delete the old, suggested email profile but my old, suggested email keeps showing up. To proceed, you do need credentials, but I just assume the PC does not show anything at all and that it forgets my email address. I do not want someone that I may let someone use my computer to even know my outlook email address. Microsoft Edge offers other way to credential the machine (SMS, emails etc.) I do not want anyone who is lent the machine sees any of this either. Why is Microsoft being so "helpful" when I don't want them to be. This is all a terrible security breach. I can't safely let someone use nor sell my computer without stripping down to the bare bones. And who know, will Microsoft tell the PC the email address since it has the serial number from the motherboard. (For those of you old enough do you remember when Intel put serial numbers in 80386 CPU? Deja vu?)

Simply, how do I completely expunge my email from the computer altogether and stop this email stickiness?