Delete old networks from WiFi - "other networks"

Software
1

I had a network when I had a router a few years ago. I no longer have this router nor network but it continues to show up on my wifi list under “other networks”. I can’t figure out how to delete it. I know it doesn’t hurt anything but I’m tired of seeing it.

CleanShot 2021-09-20 at 18.36.45@2x
CleanShot 2021-09-20 at 18.36.45@2x636×826 141 KB

2

Can it be removed from the Network Preferences pane?

Screen Shot 2021-09-20 at 7.28.05 PM
Screen Shot 2021-09-20 at 7.28.05 PM1560×1376 165 KB

Then in the advanced window?

Screen Shot 2021-09-20 at 7.29.16 PM
Screen Shot 2021-09-20 at 7.29.16 PM1560×1376 208 KB

3

No. I no longer have the password from this long ago network, so can never get it to show in advanced window.

Also, can prevent wifi from showing neighbor’s networks?