fix bug

Author: haozhihan

source/module_hsolver/hsolver_pw.h

@@ -90,8 +90,6 @@ class HSolverPW
     /// @brief calculate the threshold for iterative-diagonalization for each band
     void cal_ethr_band(const double& wk, const double* wg, const double& ethr, std::vector<double>& ethrs);
 
-    std::vector<double> ethr_band;
-
 #ifdef USE_PAW
     void paw_func_in_kloop(const int ik,
                            const double tpiba);