[widgets][plottereditor] Remove test specific method

It was not needed at all.

beat/editor/test/test_plottereditor.py

@@ -79,31 +79,29 @@ class TestParameterViewer:
 class TestPlotterEditor:
     """Test that the plotter editor works correctly"""
 
-    def test_load_and_dump(self, qtbot, dataformat_model, test_prefix):
+    def test_load_and_dump(self, qtbot, dataformat_model, test_prefix, beat_context):
         asset_name = "user/scatter/1"
         asset = Asset(test_prefix, AssetType.PLOTTER, asset_name)
-        with open(asset.declaration_path, "rt") as json_file:
-            json_data = json.load(json_file)
-            editor = PlotterEditor()
-            editor.set_dataformat_model_to_combobox(dataformat_model)
-            editor.load_json(json_data)
+        json_data = asset.declaration
+        editor = PlotterEditor()
+        editor.set_context(beat_context)
+        editor.load_json(json_data)
 
-            qtbot.addWidget(editor)
+        qtbot.addWidget(editor)
 
-            assert editor.dump_json() == json_data
+        assert editor.dump_json() == json_data
 
-    def test_change_dataformat(self, qtbot, dataformat_model, test_prefix):
+    def test_change_dataformat(self, qtbot, dataformat_model, test_prefix, beat_context):
         asset_name = "user/scatter/1"
         asset = Asset(test_prefix, AssetType.PLOTTER, asset_name)
-        with open(asset.declaration_path, "rt") as json_file:
-            json_data = json.load(json_file)
-            editor = PlotterEditor()
-            editor.set_dataformat_model_to_combobox(dataformat_model)
-            editor.load_json(json_data)
+        json_data = asset.declaration
+        editor = PlotterEditor()
+        editor.set_context(beat_context)
+        editor.load_json(json_data)
 
-            qtbot.addWidget(editor)
+        qtbot.addWidget(editor)
 
-            assert editor.dump_json() == json_data
+        assert editor.dump_json() == json_data
 
         asset_list = dataformat_model.stringList()
         qtbot.keyClicks(editor.dataformat_combobox, asset_list[1])

beat/editor/widgets/plottereditor.py

@@ -151,9 +151,6 @@ class PlotterEditor(AbstractAssetEditor):
             lambda: self.library_model.setPrefixPath(self.prefix_path)
         )
 
-    def set_dataformat_model_to_combobox(self, dataformat_model):
-        self.dataformat_combobox.setModel(dataformat_model)
-
     @property
     def parameter_viewers(self):
         return self.scroll_widget.widget_list