Undo PokeCodec's PRs

This commit undoes most of PokeCodec's PRs after the debate in chat. Some
harmless or completely superseded PRs have been left alone, as there is not
much benefit in attempting to undo them.

Reverts #1104, #1108, #1115, #1118, #1119, #1124, #1126, #1127, #1132, #1136,
#1137, #1139, #1140, #1144, #1148, #1149, #1150, #1153, #1155, #1177, #1179,
#1180, #1181, #1182 and #1183.

include/constants/battle_pyramid.h

@@ -7,6 +7,16 @@
 #define FLOOR_WALKABLE_METATILE 0x28D
 #define FLOOR_EXIT_METATILE 0x28E
 
+#define HINT_EXIT_DIRECTION                   0
+#define HINT_REMAINING_ITEMS                  1
+#define HINT_REMAINING_TRAINERS               2
+#define HINT_EXIT_SHORT_REMAINING_TRAINERS    3
+#define HINT_EXIT_SHORT_REMAINING_ITEMS       4
+#define HINT_EXIT_MEDIUM_REMAINING_TRAINERS   5
+#define HINT_EXIT_MEDIUM_REMAINING_ITEMS      6
+#define HINT_EXIT_FAR_REMAINING_TRAINERS      7
+#define HINT_EXIT_FAR_REMAINING_ITEMS         8
+
 #define OBJ_TRAINERS  0
 #define OBJ_ITEMS     1