remove duplicate function definition with only different return type

Index: sdk_includes/steam_gameserver.h
--- sdk_includes/steam_gameserver.h.orig
+++ sdk_includes/steam_gameserver.h
@@ -63,9 +63,6 @@ const uint16 STEAMGAMESERVER_QUERY_PORT_SHARED = 0xfff
 //		ISteamGameServer::GetNextOutgoingPacket.)
 // - The version string should be in the form x.x.x.x, and is used by the master server to detect when the
 //		server is out of date.  (Only servers with the latest version will be listed.)
-#ifndef STEAM_API_EXPORTS
-S_API steam_bool SteamGameServer_Init( uint32 unIP, uint16 usSteamPort, uint16 usGamePort, uint16 usQueryPort, EServerMode eServerMode, const char *pchVersionString );
-#endif
 S_API steam_bool S_CALLTYPE SteamInternal_GameServer_Init( uint32 unIP, uint16 usPort, uint16 usGamePort, uint16 usQueryPort, EServerMode eServerMode, const char *pchVersionString );
 
 // Shutdown SteamGameSeverXxx interfaces, log out, and free resources.
