public B dropDefaultResources() {
            failIfAlreadyBuilt();
            resources.remove(DEFAULT_RESOURCES);
            return (B)this;
        }
Drop the default set of rules. Useful in parsing ONLY company specific useragents.
@return the current Builder instance.
analyzer/src/main/java/nl/basjes/parse/useragent/AbstractUserAgentAnalyzerDirect.java