refactor(dftu): remove redundant includes in module_pwdft dftu files

- dftu_base.h: drop klist.h (UnitCell from unitcell.h, matrix via charge_mixing.h)
- dftu_base.cpp: drop <cmath>/<complex>/<iomanip> (no usage)
- dftu_output.cpp: drop <cstring>/<sstream> (no usage); replace parameter.h with global_variable.h (GlobalV source, PARAM unused)
- dftu_cal_occ_pw.cpp: replace parameter.h with global_variable.h (GlobalV source, PARAM unused)

Author: abacus_fixer

source/source_pw/module_pwdft/dftu_base.cpp

@@ -6,11 +6,8 @@
 #include "source_base/timer.h"
 #include "source_io/module_parameter/parameter.h"
 
-#include <cmath>
-#include <complex>
 #include <cstring>
 #include <fstream>
-#include <iomanip>
 #include <sstream>
 #include <vector>
 

source/source_pw/module_pwdft/dftu_base.h

@@ -1,7 +1,6 @@
 #ifndef DFTU_BASE_H
 #define DFTU_BASE_H
 
-#include "source_cell/klist.h"
 #include "source_cell/unitcell.h"
 #include "source_estate/module_charge/charge_mixing.h"
 

source/source_pw/module_pwdft/dftu_cal_occ_pw.cpp

@@ -2,7 +2,7 @@
 #include "source_pw/module_pwdft/dftu_tools_pw.h"
 #include "source_pw/module_pwdft/onsite_proj.h"
 #include "source_base/parallel_reduce.h"
-#include "source_io/module_parameter/parameter.h"
+#include "source_base/global_variable.h"
 #include "source_base/timer.h"
 #include "source_base/parallel_global.h"
 

source/source_pw/module_pwdft/dftu_output.cpp

@@ -3,14 +3,12 @@
 #include "source_pw/module_pwdft/dftu_base.h"
 #include "source_base/constants.h"
 #include "source_base/global_function.h"
+#include "source_base/global_variable.h"
 #include "source_base/timer.h"
-#include "source_io/module_parameter/parameter.h"
 
 #include <cmath>
-#include <cstring>
 #include <fstream>
 #include <iomanip>
-#include <sstream>
 #include <vector>
 
 // local inline helpers for eigenvalue calculation