MINOR: Remove unused method in ToolsUtils

core/src/main/scala/kafka/utils/ToolsUtils.scala

@@ -17,11 +17,8 @@
 package kafka.utils
 
 import joptsimple.OptionParser
-import org.apache.kafka.common.{Metric, MetricName}
 import org.apache.kafka.server.util.CommandLineUtils
 
-import scala.collection.mutable
-
 object ToolsUtils {
 
   def validatePortOrDie(parser: OptionParser, hostPort: String): Unit = {
@@ -37,35 +34,6 @@ object ToolsUtils {
       CommandLineUtils.printUsageAndExit(parser, "Please provide valid host:port like host1:9091,host2:9092\n ")
   }
 
-  /**
-    * print out the metrics in alphabetical order
-    * @param metrics  the metrics to be printed out
-    */
-  def printMetrics(metrics: mutable.Map[MetricName, _ <: Metric]): Unit = {
-    var maxLengthOfDisplayName = 0
-
-    val sortedMap = metrics.toSeq.sortWith( (s,t) =>
-      Array(s._1.group(), s._1.name(), s._1.tags()).mkString(":")
-        .compareTo(Array(t._1.group(), t._1.name(), t._1.tags()).mkString(":")) < 0
-    ).map {
-      case (key, value) =>
-        val mergedKeyName = Array(key.group(), key.name(), key.tags()).mkString(":")
-        if (maxLengthOfDisplayName < mergedKeyName.length) {
-          maxLengthOfDisplayName = mergedKeyName.length
-        }
-        (mergedKeyName, value.metricValue)
-    }
-    println(s"\n%-${maxLengthOfDisplayName}s   %s".format("Metric Name", "Value"))
-    sortedMap.foreach {
-      case (metricName, value) =>
-        val specifier = value match {
-          case _ @ (_: java.lang.Float | _: java.lang.Double) => "%.3f"
-          case _ => "%s"
-        }
-        println(s"%-${maxLengthOfDisplayName}s : $specifier".format(metricName, value))
-    }
-  }
-
   /**
    * This is a simple wrapper around `CommandLineUtils.printUsageAndExit`.
    * It is needed for tools migration (KAFKA-14525), as there is no Java equivalent for return type `Nothing`.