Remove benchmark for merge

Author: jtuglu1

benchmarks/pom.xml

@@ -96,11 +96,6 @@
       <artifactId>druid-histogram</artifactId>
       <version>${project.parent.version}</version>
     </dependency>
-    <dependency>
-      <groupId>org.apache.druid.extensions.contrib</groupId>
-      <artifactId>druid-spectator-histogram</artifactId>
-      <version>${project.parent.version}</version>
-    </dependency>
     <dependency>
       <groupId>org.apache.druid.extensions</groupId>
       <artifactId>druid-stats</artifactId>