The Drop Property command removes a property from the schema. This doesn't remove the property values in records, but just change the schema information. Records will continue to have the property values if any.
DROP PROPERTY <class>.<property>
Remove the property 'name' in class 'User':
DROP PROPERTY user.name
To create a new property use the Create Property command.
To know more about other SQL commands look at SQL commands.
This is a command of the Orient console. To know all the commands go to Console-Commands.