Fix checkstyle error

Fabio Pistolesi

10.14.2015 15390fa9c1a6a40081961f6bd8be458685791a1f

 opendj-server-legacy/src/main/java/org/opends/server/backends/pluggable/IndexBuffer.java

@@ -36,7 +36,6 @@

import org.forgerock.opendj.ldap.ByteString;
import org.opends.server.backends.pluggable.spi.StorageRuntimeException;
import org.opends.server.backends.pluggable.spi.TreeName;
import org.opends.server.backends.pluggable.spi.WriteableTransaction;
import org.opends.server.types.DirectoryException;