Use static linking instead of dynamic linking

include/core/Rect3.hpp

@@ -1,16 +1,6 @@
 #ifndef RECT3_H
 #define RECT3_H
 
-#if defined(_WIN32)
-#  ifdef _GD_CPP_CORE_API_IMPL
-#    define GD_CPP_CORE_API __declspec(dllexport)
-#  else
-#    define GD_CPP_CORE_API __declspec(dllimport)
-#  endif
-#else
-#  define GD_CPP_CORE_API
-#endif
-
 #include "Vector3.hpp"
 
 #include "Plane.hpp"
@@ -19,7 +9,7 @@
 
 namespace godot {
 
-class GD_CPP_CORE_API Rect3 {
+class Rect3 {
 public:
 	Vector3 pos;
 	Vector3 size;