This check is unnecessary. SystemDictionary::load_shared_class() should not be called with a NULL class

http://hg.openjdk.java.net/jdk/jdk/file/ee37c9b2eb61/src/hotspot/share/classfile/systemDictionary.cpp#l1272

InstanceKlass* SystemDictionary::load_shared_class(InstanceKlass* ik,
                                                   Handle class_loader,
                                                   Handle protection_domain,
                                                   const ClassFileStream *cfs,
                                                   TRAPS) {

  if (ik != NULL) { // <<<< remove!