public synchronized void removeGraphiteReporter() {
        if (null != graphiteReporter)
            graphiteReporter.stop();

        graphiteReporter = null;
    }
Stop a {@link GraphiteReporter} previously created by a call to
{@link #addGraphiteReporter(String, int, String, long)} and release it
for GC. Idempotent between calls to the associated add method. Does
nothing before the first call to the associated add method.
gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/util/MetricManager.java