Refactoring and cleanup in the Metrics module:
 * Removed logging related code inside class MetricsManager
 * Removed @Component related code, because it is not suppose to be used
   as an component.
 * Added a new class-wrapper so the Metrics can be used as a loadable service:
   MetricsManagerComponent. The name and the location of this class
   will be refactored in the future.
 * Added new method MetricsManager.removeMetric()
 * Line formatting
 * Changed "interface MetricsService" to public
diff --git a/utils/misc/src/main/java/org/onlab/metrics/MetricsService.java b/utils/misc/src/main/java/org/onlab/metrics/MetricsService.java
index 1c4baea..9e9dfa0 100644
--- a/utils/misc/src/main/java/org/onlab/metrics/MetricsService.java
+++ b/utils/misc/src/main/java/org/onlab/metrics/MetricsService.java
@@ -13,7 +13,7 @@
 /**
  * Metrics Service to collect metrics.
  */
-interface MetricsService {
+public interface MetricsService {
 
     /**
      * Registers a component.
@@ -90,6 +90,18 @@
              T metric);
 
     /**
+     * Removes the metric with the given name.
+     *
+     * @param component component the Metric is defined in
+     * @param feature feature the Metric is defined in
+     * @param metricName local name of the metric
+     * @return true if the metric existed and was removed, otherwise false
+     */
+    boolean removeMetric(MetricsComponent component,
+                         MetricsFeature feature,
+                         String metricName);
+
+    /**
      * Fetches the existing Timers.
      *
      * @param filter filter to use to select Timers
@@ -129,15 +141,15 @@
      * Fetches the existing Histograms.
      *
      * @param filter filter to use to select Histograms
-     * @return a map of the Histograms that match the filter, with the key as the
-     *         name String to the Histogram.
+     * @return a map of the Histograms that match the filter, with the key as
+     *         the name String to the Histogram.
      */
      Map<String, Histogram> getHistograms(MetricFilter filter);
+
     /**
      * Removes all Metrics that match a given filter.
      *
      * @param filter filter to use to select the Metrics to remove.
      */
      void removeMatching(MetricFilter filter);
-
 }