I realized that the desire to get rid of HTTPS is ill advised! With HTTP all passwords are transmitted in the CLEAR ! ==> That's NOT what I want
I wanted to get rid of the "NOT Secure" Waring within CHROME ... since recently chrome does NOT accept any self signed certs anymore ... and thus produces the warning and behaves differently for the presumably less secure sites.
Creating an official signed cert for my router seems to be way over my head: Intranet SSL Certificates
Click "Advanced" and accept the cert if you are convinced that it is your own device you're connecting to.
This is the case for even enterprise-grade gear, like Cisco switches.
As I only connect to these devices over a management VLAN with limited access, it lets me be even more confident. You should be able to check the cert on the device if you SSH in to compare it with that shown by Chrome.