Remove DiagoBPCG Base class override

Author: Cstandardlib

source/module_hsolver/diago_bpcg.h

@@ -64,7 +64,7 @@ class DiagoBPCG
      * @param psi The input wavefunction psi matrix with [dim: n_basis x n_band, column major].
      * @param eigenvalue_in Pointer to the eigen array with [dim: n_band, column major].
      */
-    void diag(hamilt::Hamilt<T, Device> *phm_in, psi::Psi<T, Device> &psi, Real *eigenvalue_in) override;
+    void diag(hamilt::Hamilt<T, Device> *phm_in, psi::Psi<T, Device> &psi, Real *eigenvalue_in);
 
 
   private: