Revert protocol 69 pending further discussion (#4962)

code/qcommon/files.c

@@ -1030,11 +1030,6 @@ qboolean FS_IsDemoExt(const char *filename, int namelen)
 		if(protocol == com_protocol->integer)
 			return qtrue;
 
-#ifdef PROTOCOL_SUPPORT_OLD
-                if(protocol == PROTOCOL_OLD_VERSION)
-                        return qtrue;
-#endif
-
 		for(index = 0; demo_protocols[index]; index++)
 		{
 			if(demo_protocols[index] == protocol)