archaius-core/src/main/java/com/netflix/config/DynamicPropertyUpdater.java
void deleteProperty(final String key, final Configuration config) {
        if (config.containsKey(key)) {
            logger.debug("deleting property key [" + key + "]");

            config.clearProperty(key);
        }
    }
void deleteProperty(final String key, final Configuration config) {
        if (config.containsKey(key)) {
            logger.debug("deleting property key [" + key + "]");

            config.clearProperty(key);
        }
    }
Delete a property in the underlying config

@param key
@param config