code: public void removeCommand(final String commandName) throws DevFailed {
          final CommandImpl toRemove = dynamicCommands.get(commandName.toLowerCase(Locale.ENGLISH));
          deviceImpl.removeCommand(toRemove);
          dynamicCommands.remove(commandName);
          deviceImpl.pushInterfaceChangeEvent(false);
      }
docs: Remove a command
  
  @param commandName command name
  @throws DevFailed