Uninstall ORACLE HOME manually

You can use to deinstall ORACLE_HOME from inventory with following method.(oracle database or grid home)

export ORACLE_HOME=

# detach 
$ORACLE_HOME/oui/bin/runInstaller -detachHome -silent -local ORACLE_HOME=$ORACLE_HOME

# confirm:
$ORACLE_HOME/OPatch/opatch lsinventory -all   

# remove directory
rm -rf $ORACLE_HOME