remove mesh origin snapping

src/libslic3r/BeltGCode.hpp

@@ -9,7 +9,7 @@ namespace Slic3r {
 // Inherits from GCode and overrides virtual hooks to:
 // - Create a BeltGCodeWriter instead of a plain GCodeWriter
 // - Write belt configuration to the G-code header
-// - Update per-axis origin snap when switching instances
+// - Adjust the origin for global pre-slice transforms when switching instances
 // - Disable arc fitting (G2/G3 not supported on belt printers)
 class BeltGCode : public GCode
 {
@@ -18,11 +18,6 @@ protected:
     void write_belt_header(GCodeOutputStream &file, const Print &print) override;
     void on_set_origin(const PrintObject *obj, const Point &inst_shift) override;
     bool should_disable_arc_fitting() const override { return true; }
-
-private:
-    // Per-axis origin snap config (set during init, used in on_set_origin).
-    bool   m_origin_snap[3]        = {false, false, false};
-    double m_origin_snap_offset[3] = {0., 0., 0.};
 };
 
 } // namespace Slic3r