Remove maven emma plugin

Previously, the plugin "emma" was integrated/used for maven site deployment. The following commits removed site deployment entirely.
For reference
- https://github.com/apache/jclouds/pull/91/commits/e02503e1cb59a19e7c48099ce1767ef5f3b7e816
- https://github.com/apache/jclouds/pull/91/commits/9158ab0b0eb7f0a9a9f889cfc86f7bcef7868ff3
diff --git a/project/pom.xml b/project/pom.xml
index 2ec2c94..0d56571 100644
--- a/project/pom.xml
+++ b/project/pom.xml
@@ -857,11 +857,6 @@
           </configuration>
         </plugin>
         <plugin>
-          <groupId>org.sonatype.maven.plugin</groupId>
-          <artifactId>emma-maven-plugin</artifactId>
-          <version>1.2</version>
-        </plugin>
-        <plugin>
           <groupId>org.apache.rat</groupId>
           <artifactId>apache-rat-plugin</artifactId>
           <configuration>