Path: Remove duplicate populateCombobox() definitions

Apply python DRY philosophy to `populateCombobox()` method throughout PathScripts modules.

src/Mod/Path/PathScripts/PathThreadMillingGui.py

@@ -95,21 +95,6 @@ class TaskPanelOpPage(PathCircularHoleBaseGui.TaskPanelOpPage):
 
         return form
 
-    def populateCombobox(self, form, enumTups, comboBoxesPropertyMap):
-        """fillComboboxes(form, comboBoxesPropertyMap) ... populate comboboxes with translated enumerations
-        ** comboBoxesPropertyMap will be unnecessary if UI files use strict combobox naming protocol.
-        Args:
-            form = UI form
-            enumTups = list of (translated_text, data_string) tuples
-            comboBoxesPropertyMap = list of (translated_text, data_string) tuples
-        """
-        # Load appropriate enumerations in each combobox
-        for cb, prop in comboBoxesPropertyMap:
-            box = getattr(form, cb)  # Get the combobox
-            box.clear()  # clear the combobox
-            for text, data in enumTups[prop]:  #  load enumerations
-                box.addItem(text, data)
-
     def getFields(self, obj):
         """getFields(obj) ... update obj's properties with values from the UI"""
         PathLog.track()