Fix wrong import

Author: dliappis

client/rest-high-level/src/test/java/org/elasticsearch/client/IndicesRequestConvertersTests.java

@@ -24,7 +24,6 @@
 import org.apache.http.client.methods.HttpHead;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpPut;
-import org.apache.logging.log4j.core.impl.ExtendedStackTraceElement;
 import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.admin.indices.alias.Alias;