rm unused ReMesocrystal::volume

Resample/Particle/ReMesocrystal.cpp

@@ -40,11 +40,6 @@ ReMesocrystal* ReMesocrystal::clone() const
     return new ReMesocrystal(i_layer(), m_lattice, *m_basis, *m_outer_shape, m_position_variance);
 }
 
-double ReMesocrystal::volume() const
-{
-    return m_outer_shape->volume();
-}
-
 double ReMesocrystal::radialExtension() const
 {
     return m_outer_shape->radialExtension();

Resample/Particle/ReMesocrystal.h

@@ -39,7 +39,6 @@ public:
         m_basis->setAmbientMaterial(material);
     }
 
-    double volume() const;
     double radialExtension() const override;
 
     Span zSpan() const override;