MCR-3137 remove unused import

Author: toKrause

mir-module/src/main/java/org/mycore/mir/authorization/MirSelfRegistrationServlet.java

@@ -31,7 +31,6 @@
 import org.jdom2.Element;
 import org.mycore.common.MCRMailer;
 import org.mycore.common.MCRSessionMgr;
-import org.mycore.common.MCRUtils;
 import org.mycore.common.config.MCRConfiguration2;
 import org.mycore.common.content.MCRJDOMContent;
 import org.mycore.common.xml.MCRXMLFunctions;