Removing rogue maven-source-plugin entry

+ Doesn't do anything based on how it was declared (missing goal/phase/execution/configuration)

Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>

jetty-plus/pom.xml

@@ -33,12 +33,6 @@
           </instructions>
         </configuration>
       </plugin>
-      <!-- always include the sources to be able to prepare the eclipse-jetty-SDK feature
-      with a snapshot. -->
-      <plugin>
-         <groupId>org.apache.maven.plugins</groupId>
-         <artifactId>maven-source-plugin</artifactId>
-      </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>findbugs-maven-plugin</artifactId>