WL#3368 mixed binlog_format default

An amendment for parsing argument in case NDB is compiled and active.
  NDB switches from mixed to row-based and back per each query. The previous patch
  was not aware of such behaviour and made exceptional assingment to row-based when
  no command line arg --binlog-format provided.
  
  Removing #if HAVE_NDB_BINLOG block alltogether: ndb supports mixed and if server 
  was build without NDB using binlog nothing to care.
  Test for this piece of code is rather specific. While there is active bug23110
  ndb_alter_table and some other should fail if no explict --binlog-format is given:
  mysql-test-run ndb_alter_table

sql/mysqld.cc

@@ -3147,11 +3147,6 @@ with --log-bin instead.");
   }
   if (global_system_variables.binlog_format == BINLOG_FORMAT_UNSPEC)
   {
-#if defined(HAVE_NDB_BINLOG) && defined(HAVE_ROW_BASED_REPLICATION)
-    if (opt_bin_log && have_ndbcluster == SHOW_OPTION_YES)
-      global_system_variables.binlog_format= BINLOG_FORMAT_ROW;
-    else
-#endif
 #if defined(HAVE_ROW_BASED_REPLICATION)
       global_system_variables.binlog_format= BINLOG_FORMAT_MIXED;
 #else