en
conf t

do show run
do show ip route static

no ip route 192.168.2.0 255.255.255.0 192.168.1.2
no ip route 192.168.3.0 255.255.255.0 192.168.1.2

do show run
do show ip route static

do show ip int bri (or) do show ip interface brief

int g0/0
 no ip address 192.168.1.1 255.255.255.0
 shutdown
exit

int g0/1
 no ip address 192.168.2.1 255.255.255.0
 shutdown
exit

do show run
do show ip int bri