Use XS Point everywhere

xs/src/myinit.h

@@ -1,13 +1,7 @@
 #ifndef _myinit_h_
 #define _myinit_h_
 
-#include <vector>
-
 namespace Slic3r {}
 using namespace Slic3r;
 
-#define av_store_point_xy(AV, X, Y)              \
-  av_store(AV, 0, newSViv(X));                   \
-  av_store(AV, 1, newSViv(Y))
-
 #endif