Remove clearly marked python 2 imports.

IPython/core/debugger.py

@@ -361,10 +361,8 b' class Pdb(OldPdb):'
                 print("Context must be a positive integer", file=self.stdout)
         except (TypeError, ValueError):
                 print("Context must be a positive integer", file=self.stdout)
-        try:
-            import reprlib  # Py 3
-        except ImportError:
-            import repr as reprlib  # Py 2
+
+        import reprlib
 
         ret = []
 

IPython/core/tests/test_debugger.py

@@ -48,10 +48,7 b' class PdbTestInput(object):'
 #-----------------------------------------------------------------------------
 
 def test_longer_repr():
-    try:
-        from reprlib import repr as trepr  # Py 3
-    except ImportError:
-        from repr import repr as trepr  # Py 2
+    from reprlib import repr as trepr
     
     a = '1234567890'* 7
     ar = "'1234567890123456789012345678901234567890123456789012345678901234567890'"

IPython/lib/display.py

@@ -266,10 +266,7 b' class IFrame(object):'
     def _repr_html_(self):
         """return the embed iframe"""
         if self.params:
-            try:
-                from urllib.parse import urlencode # Py 3
-            except ImportError:
-                from urllib import urlencode
+            from urllib.parse import urlencode
             params = "?" + urlencode(self.params)
         else:
             params = ""

IPython/lib/inputhook.py

@@ -509,10 +509,7 b' class TkInputHook(InputHookBase):'
         warn("This function is deprecated since IPython 5.0 and will be removed in future versions.",
                 DeprecationWarning, stacklevel=2)
         if app is None:
-            try:
-                from tkinter import Tk  # Py 3
-            except ImportError:
-                from Tkinter import Tk  # Py 2
+            from tkinter import Tk
             app = Tk()
             app.withdraw()
             self.manager.apps[GUI_TK] = app