idlelib: remove unused names and imports (one is a duplicate import).
diff --git a/Lib/idlelib/TreeWidget.py b/Lib/idlelib/TreeWidget.py
index 1e56e86..88083f0 100644
--- a/Lib/idlelib/TreeWidget.py
+++ b/Lib/idlelib/TreeWidget.py
@@ -246,7 +246,7 @@
         else:
             self.edit_finish()
         try:
-            label = self.label
+            self.label
         except AttributeError:
             # padding carefully selected (on Windows) to match Entry widget:
             self.label = Label(self.canvas, text=text, bd=0, padx=2, pady=2)