fix(abacus-plot): fix reshape parameter and PDOS plotting issues (#7455)

- Remove invalid 'newshape' keyword from np.reshape() call
- Remove unnecessary reassignment of dosplot.ax after _plot() calls

Fixes #6864

Author: mintleaf84

tools/plot-tools/abacus_plot/dos.py

@@ -248,7 +248,7 @@ def _read(self):
             orb['data'] = np.asarray(data, dtype=float)
             self.orbitals.append(orb)
 
-        self.energy = np.reshape(e_list, newshape=(-1, 1)).astype(float)
+        self.energy = np.reshape(e_list, (-1, 1)).astype(float)
 
     def _all_sum(self) -> Tuple[np.ndarray, int]:
         res = np.zeros_like(self.orbitals[0]["data"], dtype=float)
@@ -423,9 +423,9 @@ def _parial_plot(self,
                                       dosplot.plot_params["xlabel_params"])
             else:
                 dosplot.ax.set_xlabel("Energy(eV)", size=25)
-            dosplot.ax = self._plot(dosplot, energy_f, tdos, "TDOS")
+            self._plot(dosplot, energy_f, tdos, "TDOS")
             for elem in dos.keys():
-                dosplot.ax = self._plot(dosplot, energy_f, dos[elem], elem)
+                self._plot(dosplot, energy_f, dos[elem], elem)
             if "notes" in dosplot.plot_params.keys():
                 dosplot._set_figure(energy_range, dos_range,
                                     notes=dosplot.plot_params["notes"])