A side effect of LUCENE-3808: validation of shadowed static hooks

indicated this one as the violator. Since this is empty and cannot be
overriden anyway I'm removing it.
Removed shadowed empty afterClass() hook.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1296238 13f79535-47bb-0310-9956-ffa450edef68

solr/core/src/test/org/apache/solr/cloud/AbstractDistributedZkTestCase.java

@@ -180,8 +180,4 @@ public abstract class AbstractDistributedZkTestCase extends BaseDistributedSearc
     zkClient.printLayoutToStdOut();
     zkClient.close();
   }
-  
-  @AfterClass
-  public static void afterClass() throws InterruptedException {
-  }
 }