remove legacy code

Author: dzzz2001

source/source_lcao/module_gint/temp_gint/kernel/gint_gpu_vars.cpp

@@ -101,8 +101,6 @@ GintGpuVars::GintGpuVars(std::shared_ptr<const BigGridInfo> biggrid_info,
 
     checkCuda(cudaMalloc((void**)&iat2it_d, sizeof(int) * ucell.nat));
     checkCuda(cudaMemcpy(iat2it_d, ucell.iat2it, sizeof(int) * ucell.nat, cudaMemcpyHostToDevice));
-
-    gemm_algo_selector(mgrid_num, fastest_matrix_mul, ucell);
 }
 
 GintGpuVars::~GintGpuVars()

source/source_lcao/module_gint/temp_gint/kernel/gint_gpu_vars.h

@@ -7,7 +7,6 @@
 #include "source_cell/atom_spec.h"
 #include "source_lcao/module_gint/temp_gint/biggrid_info.h"
 #include "gint_helper.cuh"
-#include "source_lcao/module_gint/kernels/cuda/gemm_selector.cuh"
 
 namespace ModuleGint
 {
@@ -39,7 +38,6 @@ class GintGpuVars
 
     // the index of gpu device
     int dev_id_ = 0;
-    matrix_multiple_func_type fastest_matrix_mul;
 
 };