Dc & ADC Replication Error

I have Primary DC With DNS, Terminal Server,DHCP

I create one ADC and replicate AD with them it working
DNS configure in both the server
DHCP configured in ADC
GC in DC & ADC Both
But my all role current in DC
Source : NTDS General
Event Id : 1126

Warning NTDS KCC
Enent ID : 1308

Source NTDS REp[lication
Event Id : 1988

Now I want to remove dc from that server and kept that server as Terminal server only
what is the procedure for that