remove KafkaTopology-specific dependencies

Accidentally included the KafkaTopology deps in the main topology_dependencies.xml file

ivy/topology_dependencies.xml

@@ -5,18 +5,12 @@
     <dependency org="org.jruby" name="jruby-core" rev="1.7.11" conf="default" transitive="true"/>
     <dependency org="org.jruby" name="jruby-stdlib" rev="1.7.11" conf="default" transitive="true"/>
 
-    <!-- explicitely specify jffi to also fetch the native jar. make sure to update jffi version matching jruby-core version -->
+    <!-- explicitly specify jffi to also fetch the native jar. make sure to update jffi version matching jruby-core version -->
     <!-- this is the only way I found using Ivy to fetch the native jar -->
     <dependency org="com.github.jnr" name="jffi" rev="1.2.7" conf="default" transitive="true">
       <artifact name="jffi" type="jar" />
       <artifact name="jffi" type="jar" m:classifier="native"/>
     </dependency>
 
-
-    <dependency org="org.scala-lang" name="scala-library" rev="2.9.2" conf="default" transitive="false"/>
-    <dependency org="org.apache.kafka" name="kafka_2.9.2" rev="0.8.1.1" conf="default" transitive="false" />
-    <dependency org="net.wurstmeister.storm" name="storm-kafka-0.8-plus" rev="0.4.0" conf="default" transitive="false" />
-    <dependency org="com.yammer.metrics" name="metrics-core" rev="2.2.0"/>
-
   </dependencies>
 </ivy-module>