Clean up unused Forward Declarations (#16324)

src/mapgen/mapgen.h

@@ -32,17 +32,12 @@ class NodeDefManager;
 extern const FlagDesc flagdesc_mapgen[];
 extern const FlagDesc flagdesc_gennotify[];
 
-class Biome;
 class BiomeGen;
 struct BiomeParams;
 class BiomeManager;
 class EmergeParams;
-class EmergeManager;
-class MapBlock;
-class VoxelManipulator;
 struct BlockMakeData;
 class VoxelArea;
-class Map;
 
 enum MapgenObject {
 	MGOBJ_VMANIP,

src/mapgen/mapgen_carpathian.h

@@ -10,7 +10,6 @@
 #define MGCARPATHIAN_CAVERNS 0x01
 #define MGCARPATHIAN_RIVERS  0x02
 
-class BiomeManager;
 
 extern const FlagDesc flagdesc_mapgen_carpathian[];
 

src/mapgen/mapgen_flat.h

@@ -12,7 +12,6 @@
 #define MGFLAT_HILLS 0x02
 #define MGFLAT_CAVERNS 0x04
 
-class BiomeManager;
 
 extern const FlagDesc flagdesc_mapgen_flat[];
 

src/mapgen/mapgen_fractal.h

@@ -10,7 +10,6 @@
 ///////////// Mapgen Fractal flags
 #define MGFRACTAL_TERRAIN     0x01
 
-class BiomeManager;
 
 extern const FlagDesc flagdesc_mapgen_fractal[];
 

src/mapgen/mapgen_v5.h

@@ -10,7 +10,6 @@
 ///////// Mapgen V5 flags
 #define MGV5_CAVERNS 0x01
 
-class BiomeManager;
 
 extern const FlagDesc flagdesc_mapgen_v5[];
 

src/mapgen/mapgen_v7.h

@@ -14,7 +14,6 @@
 #define MGV7_CAVERNS     0x08
 #define MGV7_BIOMEREPEAT 0x10 // Now unused
 
-class BiomeManager;
 
 extern const FlagDesc flagdesc_mapgen_v7[];
 

src/mapgen/mapgen_valleys.h

@@ -21,7 +21,6 @@ Licensing changed by permission of Gael de Sailly.
 #define MGVALLEYS_VARY_RIVER_DEPTH 0x04
 #define MGVALLEYS_ALT_DRY          0x08
 
-class BiomeManager;
 class BiomeGenOriginal;
 
 extern const FlagDesc flagdesc_mapgen_valleys[];

src/mapgen/mg_schematic.h

@@ -11,9 +11,7 @@
 
 class Map;
 class ServerMap;
-class Mapgen;
 class MMVManip;
-class PseudoRandom;
 class NodeResolver;
 class Server;