fix compile without mpi

Author: Qianruipku

source/module_esolver/esolver_ks_pw.cpp

@@ -269,15 +269,12 @@ void ESolver_KS_PW<T, Device>::before_scf(UnitCell& ucell, const int istep)
     if (ucell.ionic_position_updated)
     {
         this->CE.update_all_dis(ucell);
-        this->CE.extrapolate_charge(
-#ifdef __MPI
-            &this->Pgrid,
-#endif
-            ucell,
-            this->pelec->charge,
-            &this->sf,
-            GlobalV::ofs_running,
-            GlobalV::ofs_warning);
+        this->CE.extrapolate_charge(&this->Pgrid,
+                                    ucell,
+                                    this->pelec->charge,
+                                    &this->sf,
+                                    GlobalV::ofs_running,
+                                    GlobalV::ofs_warning);
     }
 
     // init Hamilt, this should be allocated before each scf loop

source/module_esolver/esolver_of.cpp

@@ -247,15 +247,7 @@ void ESolver_OF::before_opt(const int istep, UnitCell& ucell)
     if (ucell.ionic_position_updated)
     {
         CE.update_all_dis(ucell);
-        CE.extrapolate_charge(
-#ifdef __MPI
-            &(Pgrid),
-#endif
-            ucell,
-            pelec->charge,
-            &(sf),
-            GlobalV::ofs_running,
-            GlobalV::ofs_warning);
+        CE.extrapolate_charge(&Pgrid, ucell, pelec->charge, &sf, GlobalV::ofs_running, GlobalV::ofs_warning);
     }
 
     this->pelec->init_scf(istep, ucell, Pgrid, sf.strucFac, locpp.numeric, ucell.symm);

source/module_esolver/lcao_before_scf.cpp

@@ -51,15 +51,12 @@ void ESolver_KS_LCAO<TK, TR>::before_scf(UnitCell& ucell, const int istep)
     if (ucell.ionic_position_updated)
     {
         this->CE.update_all_dis(ucell);
-        this->CE.extrapolate_charge(
-#ifdef __MPI
-            &(this->Pgrid),
-#endif
-            ucell,
-            this->pelec->charge,
-            &(this->sf),
-            GlobalV::ofs_running,
-            GlobalV::ofs_warning);
+        this->CE.extrapolate_charge(&(this->Pgrid),
+                                    ucell,
+                                    this->pelec->charge,
+                                    &(this->sf),
+                                    GlobalV::ofs_running,
+                                    GlobalV::ofs_warning);
     }
 
     //----------------------------------------------------------