code: public void remove_attribute(final String attname) throws DevFailed {
  	// Remove property in database
  	if (Util._UseDb) {
  	    final DeviceProxy dev = new DeviceProxy(device_name);
  	    final DbAttribute da = dev.get_attribute_property(attname);
  	    dev.delete_attribute_property(da);
  
  	}
  	dev_attr.remove_attribute(attname);
      }
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