clean useless code

Author: Cstandardlib

source/module_hsolver/diago_bpcg.cpp

@@ -27,7 +27,6 @@ DiagoBPCG<T, Device>::DiagoBPCG(const Real* precondition_in)
 template<typename T, typename Device>
 DiagoBPCG<T, Device>::~DiagoBPCG() {
     // Note, we do not need to free the h_prec and psi pointer as they are refs to the outside data
-    // delete this->grad_wrapper;
 }
 
 template<typename T, typename Device>

source/module_hsolver/diago_bpcg.h

@@ -319,8 +319,6 @@ class DiagoBPCG
      */
     bool test_error(const ct::Tensor& err_in, Real thr_in);
 
-    // using hpsi_info = typename hamilt::Operator<T, Device>::hpsi_info;
-
     using ct_Device = typename ct::PsiToContainer<Device>::type;
     using setmem_var_op = ct::kernels::set_memory<Real, ct_Device>;
     using resmem_var_op = ct::kernels::resize_memory<Real, ct_Device>;