I want to remove this network from SWITCH L3
THE PORT IS NO LONGER ROUTED AND I DON'T UNDERSTAND WHY IT DOESN'T WANT TO DELETE
AND IF I TURN OFF OTHER VLANS
I DO NOT UNDERSTAND WHAT HAPPENS
You cannot delete directly connected networks from your device, you would need to change the IP of the directly connected network.
Those directly connected networks used to confuse me back in the day too. As Mr. Icecream stated, it's there to stay in your routing table until you remove the IP.
This works the same whether it's configured on a VLAN SVI, physical interface, or tunnel interface. It's been a while but I think even if you shutdown the interface it may still populate in the routing table.. but that could be platform specific behavior I ran into at some point.
Once it's disconnected, then it should be removable, that's the other choice.
conf t
default interface fa0/2