remove pickleshare from external

IPython/core/interactiveshell.py

@@ -27,6 +27,8 b' import types'
 import subprocess
 from io import open as io_open
 
+from pickleshare import PickleShareDB
+
 from IPython.config.configurable import SingletonConfigurable
 from IPython.core import debugger, oinspect
 from IPython.core import magic
@@ -63,7 +65,6 b' from IPython.utils.decorators import undoc'
 from IPython.utils.io import ask_yes_no
 from IPython.utils.ipstruct import Struct
 from IPython.utils.path import get_home_dir, get_ipython_dir, get_py_filename, unquote_filename, ensure_dir_exists
-from IPython.external.pickleshare import PickleShareDB
 from IPython.utils.process import system, getoutput
 from IPython.utils.py3compat import (builtin_mod, unicode_type, string_types,
                                      with_metaclass, iteritems)

setup.py

@@ -269,7 +269,7 b" extras_require['nbconvert'].extend(extras_require['nbformat'])"
 
 install_requires = [
     'decorator',
-    'path.py', # required by pickleshare, remove when pickleshare is added here
+    'pickleshare',
     'simplegeneric>0.8',
 ]