Deprecate Report::hasMetrics and Report::metrics

docs/pages/release_notes.md

@@ -80,7 +80,8 @@ about the usage and features of the rule designer.
 *   The method {% jdoc !!core::processor.AbstractPMDProcessor#filenameFrom(DataSource) %} has been
     deprecated. It was used to determine a "short name" of the file being analyzed, so that the report
     can use short names. However, this logic has been moved to the renderers.
-
+*   The method {% jdoc !!core::Report#metrics() %} and {% jdoc core::Report::hasMetrics() %} have
+    been deprecated. They were leftovers from a previous deprecation round targeting {% jdoc core::lang.rule.StatisticalRule %}.
 
 ##### Internal APIs
 

pmd-core/src/main/java/net/sourceforge/pmd/Report.java

@@ -417,7 +417,10 @@ public class Report implements Iterable<RuleViolation> {
      *
      * @return <code>true</code> if there are metrics, <code>false</code>
      *         otherwise
+     *
+     * @deprecated see {@link StatisticalRule}
      */
+    @Deprecated
     public boolean hasMetrics() {
         return !metrics.isEmpty();
     }
@@ -426,7 +429,10 @@ public class Report implements Iterable<RuleViolation> {
      * Iterate over the metrics.
      *
      * @return an iterator over the metrics
+     *
+     * @deprecated see {@link StatisticalRule}
      */
+    @Deprecated
     public Iterator<Metric> metrics() {
         return metrics.iterator();
     }