Clean up unused Forward Declarations (#16324)

src/script/common/c_content.h

@@ -51,7 +51,6 @@ struct DigParams;
 struct HitParams;
 struct EnumString;
 struct NoiseParams;
-class Schematic;
 class ServerActiveObject;
 struct collisionMoveResult;
 namespace treegen { struct TreeDef; }

src/script/cpp_api/s_item.h

@@ -11,7 +11,6 @@
 struct PointedThing;
 struct ItemStack;
 class ServerActiveObject;
-struct ItemDefinition;
 class LuaItemStack;
 class ModApiItem;
 class InventoryList;

src/script/lua_api/l_inventory.h

@@ -9,7 +9,6 @@
 #include "inventory.h"
 #include "inventorymanager.h"
 
-class RemotePlayer;
 
 /*
 	InvRef

src/script/lua_api/l_mainmenu.h

@@ -6,7 +6,6 @@
 
 #include "lua_api/l_base.h"
 
-class AsyncEngine;
 
 /** Implementation of lua api support for mainmenu */
 class ModApiMainMenu: public ModApiBase

src/script/lua_api/l_mapgen.h

@@ -10,9 +10,9 @@
 typedef u16 biome_t;  // copy from mg_biome.h to avoid an unnecessary include
 
 class MMVManip;
-class BiomeManager;
 class BiomeGen;
 class Mapgen;
+class EmergeManager;
 
 class ModApiMapgen : public ModApiBase
 {

src/script/lua_api/l_util.h

@@ -6,7 +6,6 @@
 
 #include "lua_api/l_base.h"
 
-class AsyncEngine;
 
 class ModApiUtil : public ModApiBase
 {

src/script/lua_api/l_vmanip.h

@@ -8,7 +8,6 @@
 #include "lua_api/l_base.h"
 
 class Map;
-class MapBlock;
 class MMVManip;
 
 /*