Revert an accidental commit to work around MDEV-11601.

sql/sql_show.cc

@@ -7609,8 +7609,7 @@ TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list)
     case MYSQL_TYPE_BLOB:
       if (!(item= new (mem_root)
             Item_blob(thd, fields_info->field_name,
-                      std::min(unsigned (strlen(fields_info->field_name)),
-                               fields_info->field_length))))
+                      fields_info->field_length)))
       {
         DBUG_RETURN(0);
       }