To delete Agent and all monitored targets...
cd /u01/app/em134/bin
./emcli login -username="myuser"
You will be prompted for your password./emcli sync
./emcli get_targets -targets="oracle_emd"
To help get agent name and port for the next step./emcli delete_target -name="myhost:mydomain:3872" -type="oracle_emd" -delete_monitored_targets -async