[Cleanup] Kill unnecessary virtual

src/sand-wedge-data/myglobalfrictiondata.hh

@@ -24,12 +24,12 @@ class MyGlobalFrictionData : public GlobalFrictionData<LocalVector::dimension> {
            parset.get<double>("weakening.b"), segment),
         mu0_(parset.get<double>("mu0")) {}
 
-  double virtual const &C() const override { return C_; }
-  double virtual const &L() const override { return L_; }
-  double virtual const &V0() const override { return V0_; }
-  VirtualFunction virtual const &a() const override { return a_; }
-  VirtualFunction virtual const &b() const override { return b_; }
-  double virtual const &mu0() const override { return mu0_; }
+  double const &C() const override { return C_; }
+  double const &L() const override { return L_; }
+  double const &V0() const override { return V0_; }
+  VirtualFunction const &a() const override { return a_; }
+  VirtualFunction const &b() const override { return b_; }
+  double const &mu0() const override { return mu0_; }
 
 private:
   double const C_;