[clean code] clean unused method: getRangeConsumer (#13775)

Author: lordcheng10

pulsar-broker/src/main/java/org/apache/pulsar/broker/service/ConsistentHashingStickyKeyConsumerSelector.java

@@ -20,7 +20,6 @@
 
 import com.google.common.collect.Lists;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Comparator;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -144,8 +143,4 @@ public Map<Consumer, List<Range>> getConsumerKeyHashRanges() {
         }
         return result;
     }
-
-    Map<Integer, List<Consumer>> getRangeConsumer() {
-        return Collections.unmodifiableMap(hashRing);
-    }
 }

pulsar-broker/src/main/java/org/apache/pulsar/broker/service/HashRangeAutoSplitStickyKeyConsumerSelector.java

@@ -19,7 +19,6 @@
 package org.apache.pulsar.broker.service;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -160,8 +159,4 @@ private boolean is2Power(int num) {
         }
         return (num & num - 1) == 0;
     }
-
-    Map<Integer, Consumer> getRangeConsumer() {
-        return Collections.unmodifiableMap(rangeMap);
-    }
 }