Remove explicit module name from log messages

The module name doesn't need to be logged as MXS_MODULE_NAME will be
automatically added as a prefix to all messages logged by the module.

query_classifier/qc_mysqlembedded/qc_mysqlembedded.cc

@@ -2649,7 +2649,7 @@ int32_t qc_mysql_setup(const char* args)
 {
     if (args)
     {
-        MXS_WARNING("qc_mysqlembedded: '%s' provided as arguments, "
+        MXS_WARNING("'%s' provided as arguments, "
                     "even though no arguments are supported.", args);
     }