Fix warnings

src/game.cpp

@@ -2677,7 +2677,6 @@ void the_game(bool &kill, bool random_input, InputHandler *input,
 		camera.step(dtime);
 
 		v3f player_position = player->getPosition();
-		v3s16 pos_i = floatToInt(player_position, BS);
 		v3f camera_position = camera.getPosition();
 		v3f camera_direction = camera.getDirection();
 		f32 camera_fov = camera.getFovMax();

src/map.cpp

@@ -2754,7 +2754,6 @@ MapBlock *ServerMap::getBlockOrEmerge(v3s16 p3d)
 }
 
 void ServerMap::prepareBlock(MapBlock *block) {
-	ServerEnvironment *senv = &((Server *)m_gamedef)->getEnv();
 }
 
 s16 ServerMap::findGroundLevel(v2s16 p2d)

src/mapgen.cpp

@@ -977,7 +977,7 @@ void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) {
 
 
 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
-	bool isliquid, wasliquid, rare;
+	bool isliquid, wasliquid;
 	v3s16 em  = vm->m_area.getExtent();
 
 	for (s16 z = nmin.Z; z <= nmax.Z; z++) {