Remove useless head file parallel_reduce.h from esolver_ks.cpp

Author: sunliang98

source/module_esolver/esolver_ks.cpp

@@ -16,7 +16,6 @@
 #include "module_base/global_variable.h"
 #include "module_hamilt_lcao/module_dftu/dftu.h"
 #include "module_hamilt_pw/hamilt_pwdft/global.h"
-#include "module_base/parallel_reduce.h"
 //---------------------------------------
 #ifdef USE_PAW
 #include "module_base/parallel_common.h"