Delete target from OMS by command line

-- Connect to emcli

$ORACLE_HOME/bin/emcli login -username=SYSMAN

-- Delete Agent from the machine:

$ORACLE_HOME/bin/emcli delete_target -name="<AGENT_SERVER_NAME:PORT>" -type="oracle_emd" -delete_monitored_targets -async

-- Delete specific target:

$ORACLE_HOME/bin/emcli delete_target -name="TARGET_NAME" -type="TARGET_TYPE"