Remove unneeded plugin definition

Author: gnodet

pom.xml

@@ -247,16 +247,6 @@
       <plugin>
         <groupId>org.eclipse.sisu</groupId>
         <artifactId>sisu-maven-plugin</artifactId>
-        <version>0.9.0.M2</version>
-        <executions>
-          <execution>
-            <id>index-project</id>
-            <goals>
-              <goal>main-index</goal>
-              <goal>test-index</goal>
-            </goals>
-          </execution>
-        </executions>
       </plugin>
 
     </plugins>