chore: remove redudant use of setting defautl dimension

Author: Pankaj Agrawal

powertools-metrics/src/main/java/software/amazon/lambda/powertools/metrics/MetricsUtils.java

@@ -60,7 +60,7 @@ public static void defaultDimensionSet(final DimensionSet dimensionSet) {
         requireNonNull(dimensionSet, "Null dimension set not allowed");
 
         if(dimensionSet.getDimensionKeys().size() > 0) {
-            MetricsUtils.defaultDimensions = new DimensionSet[]{dimensionSet};
+            defaultDimensions(dimensionSet);
         }
     }
 
@@ -120,7 +120,7 @@ public static void withSingleMetric(final String name,
         }
     }
 
-    public static DimensionSet[] defaultDimensions() {
+    public static DimensionSet[] getDefaultDimensions() {
         return defaultDimensions;
     }
 
@@ -152,7 +152,6 @@ private static MetricsLogger logger() {
         MetricsContext metricsContext = new MetricsContext();
 
         if (hasDefaultDimension()) {
-            metricsContext.setDefaultDimensions(new DimensionSet());
             metricsContext.setDimensions(defaultDimensions);
         }
 

powertools-metrics/src/main/java/software/amazon/lambda/powertools/metrics/internal/LambdaMetricsAspect.java

@@ -125,10 +125,9 @@ public static void refreshMetricsContext(Metrics metrics) {
             f.setAccessible(true);
             MetricsContext context = new MetricsContext();
 
-            DimensionSet[] defaultDimensions = hasDefaultDimension() ? MetricsUtils.defaultDimensions()
+            DimensionSet[] defaultDimensions = hasDefaultDimension() ? MetricsUtils.getDefaultDimensions()
                     : new DimensionSet[]{DimensionSet.of("Service", service(metrics))};
 
-            context.setDefaultDimensions(new DimensionSet());
             context.setDimensions(defaultDimensions);
 
             f.set(metricsLogger(), context);