how to delete someone else's networks that are on my wifi list

[McGoon]

I have several networks on my wifi list that I would like to delete, but the only option on each of them is to connect.  Nowhere is there an option to forget.

[WAWood]

@McGoon 

To delete a wireless network profile in Windows 10: Click the Network icon on the lower right corner of your screen. Click Network settings. Click Manage Wi-Fi settings. Under Manage known networks, click the network you want to delete. Click Forget. The wireless network profile is deleted.

[McGoon]

These are not known networks so they don't appear in "manage known networks".  The only ones that do appear are the one I am using now and the one I used prior.

[WAWood]

@McGoon 

OK .. what shows up in the WiFi list are the SSIDs that Windows detects within range of your PC.

IF you've used a network before, it will remain in the list until you remove it, even if NOW it is out of range.

If you have NOT used it before, Windows is only showing you want it "sees" -- and there is no way to limit that.  You will see an SSID for every network that it "sees".