Only use pkg_resources.

bin/pyqso

@@ -61,11 +61,7 @@ class PyQSO:
 
         # Get the PyQSO main window defined in the Glade file.
         self.builder = Gtk.Builder()
-        try:
-            glade_file_path = pkg_resources.resource_filename("pyqso", os.path.join("res", "pyqso.glade"))
-        except ImportError:
-            # Assume the resources directory is in the parent directory of the directory containing this file.
-            glade_file_path = os.path.join(os.path.realpath(os.path.dirname(__file__)), os.pardir, "pyqso", "res", "pyqso.glade")
+        glade_file_path = pkg_resources.resource_filename("pyqso", os.path.join("res", "pyqso.glade"))
         self.builder.add_from_file(glade_file_path)
         self.window = self.builder.get_object("pyqso")
 
@@ -130,19 +126,11 @@ class PyQSO:
 
     def show_about(self, widget):
         """ Show the About dialog, which includes license information. """
-
-        # Get the About dialog defined in the Glade file.
-        try:
-            glade_file_path = pkg_resources.resource_filename("pyqso", os.path.join("res", "pyqso.glade"))
-        except ImportError:
-            # Assume the resources directory is in the parent directory of the directory containing this file.
-            glade_file_path = os.path.join(os.path.realpath(os.path.dirname(__file__)), os.pardir, "pyqso", "res", "pyqso.glade")
+        glade_file_path = pkg_resources.resource_filename("pyqso", os.path.join("res", "pyqso.glade"))
         self.builder.add_objects_from_file(glade_file_path, ("about_dialog",))
         about = self.builder.get_object("about_dialog")
-
         about.run()
         about.destroy()
-
         return
 
     def show_preferences(self, widget):