commented out code line removed

src/Classic/Solvers/ScatteringPhysics.cpp

@@ -82,7 +82,6 @@ namespace {
         FlexibleCollimator* col_m;
     };
 
-    //constexpr long double operator"" _eV(long double value) { return value * 1e-3; } unused
     constexpr long double operator"" _keV(long double value) { return value; }
     constexpr long double operator"" _MeV(long double value) { return value * 1e3; }
     constexpr long double operator"" _GeV(long double value) { return value * 1e6; }