Settingtypes.txt: Remove 2 lines missed in a recent commit (#8277)

Author: paramat

builtin/settingtypes.txt

@@ -1369,8 +1369,6 @@ mg_biome_np_humidity_blend (Humidity blend noise) noise_params_2d 0, 1.5, (8, 8,
 [*Mapgen V5]
 
 #    Map generation attributes specific to Mapgen v5.
-#    Flags that are not enabled are not modified from the default.
-#    Flags starting with 'no' are used to explicitly disable them.
 mgv5_spflags (Mapgen V5 specific flags) flags caverns caverns,nocaverns
 
 #    Controls width of tunnels, a smaller value creates wider tunnels.