Adapt OneSkill to the now fixed nested include folder logic

Author: vircon32

Games/OneSkill/GameLogic.h

@@ -6,6 +6,7 @@
     // include project headers
     #include "Player.h"
     #include "RoomMap.h"
+    #include "Physics.h"
 
     // now include all objects used in levels
     // (all these use the base headers and the player)

Games/OneSkill/levelobjects/PistolShot.h

@@ -1,6 +1,3 @@
-#include "Physics.h"
-
-
 // ---------------------------------------------------------
 //   BULLETS SHOT BY THE PLAYER'S PISTOL
 // ---------------------------------------------------------