fix ruff linit

Author: naik-aakash

tests/plotting/test_plotting.py

@@ -553,9 +553,9 @@ def test_plot_data(self, icohplist_nacl, icobilist_nacl, icooplist_nacl):
         ax_icoop_c = icoop_plotter.get_plot(xlim=(0, 4), ylim=(0, 6), color_interactions=True).gca()
         ax_icohp_c = icohp_plotter.get_plot(xlim=(0, 4), ylim=(0, 6), color_interactions=True).gca()
         ax_icobi_c = icobi_plotter.get_plot(xlim=(0, 4), ylim=(0, 6), color_interactions=True).gca()
-        handles_icoop, labels_icoop = ax_icoop_c.get_legend_handles_labels()
-        handles_icohp, labels_icohp = ax_icohp_c.get_legend_handles_labels()
-        handles_icobi, labels_icobi = ax_icobi_c.get_legend_handles_labels()
+        _handles_icoop, labels_icoop = ax_icoop_c.get_legend_handles_labels()
+        _handles_icohp, labels_icohp = ax_icohp_c.get_legend_handles_labels()
+        _handles_icobi, labels_icobi = ax_icobi_c.get_legend_handles_labels()
         assert len(set(labels_icoop)) == 3
         assert len(set(labels_icobi)) == 3
         assert len(set(labels_icohp)) == 3