Remove mangroves, make single trees block LOS.

Trees are in some ways yet another type of transparent wall, and, as
MarvinPA has said, "in general having areas full of trees where you
can see lots of enemies but not target them just plays badly."

There were two differences between trees and mangroves, besides LOS:
the latter didn't start forest fires and left shallow water when
destroyed. That behaviour is kept, instead checking whether
the tree (technically, the player) is in Swamp.

1 files changed, 0 insertions, 7 deletions

diff --git a/crawl-ref/source/feature.cc b/crawl-ref/source/feature.cc
index e424a8d0aa..f223cbf1a2 100644
--- a/crawl-ref/source/feature.cc
+++ b/crawl-ref/source/feature.cc
@@ -278,13 +278,6 @@ static void _init_feat(feature_def &f, dungeon_feature_type feat)
         f.minimap      = MF_WALL;
         break;
 
-    case DNGN_MANGROVE:
-        f.dchar        = DCHAR_TREE;
-        f.magic_symbol = Options.char_table[ DCHAR_WALL_MAGIC ];
-        f.colour       = ETC_MANGROVE;
-        f.minimap      = MF_WALL;
-        break;
-
     case DNGN_OPEN_SEA:
         f.dchar        = DCHAR_WALL;
         f.colour       = BLUE;