removed bad code and made compatible with pip 10 (#5458)

requirements.txt

@@ -20,7 +20,6 @@ rauth>=0.6.2
 requests
 redis
 selenium
--e git+https://github.com/frappe/python-pdfkit.git#egg=pdfkit
 babel
 ipython
 html2text==2016.9.19

setup.py

@@ -3,21 +3,18 @@ import os, shutil
 from distutils.command.clean import clean as Clean
 
 from setuptools import setup, find_packages
-try: # for pip >= 10
-	from pip._internal.req import parse_requirements
-except ImportError: # for pip <= 9.0.3
-	from pip.req import parse_requirements
 import re, ast
 
 # get version from __version__ variable in frappe/__init__.py
 _version_re = re.compile(r'__version__\s+=\s+(.*)')
 
+with open('requirements.txt') as f:
+	install_requires = f.read().strip().split('\n')
+
 with open('frappe/__init__.py', 'rb') as f:
 	version = str(ast.literal_eval(_version_re.search(
 		f.read().decode('utf-8')).group(1)))
 
-requirements = parse_requirements("requirements.txt", session="")
-
 class CleanCommand(Clean):
 	def run(self):
 		Clean.run(self)
@@ -52,8 +49,10 @@ setup(
 	packages=find_packages(),
 	zip_safe=False,
 	include_package_data=True,
-	install_requires=[str(ir.req) for ir in requirements],
-	dependency_links=[str(ir._link) for ir in requirements if ir._link],
+	install_requires=install_requires,
+	dependency_links=[
+		'https://github.com/frappe/python-pdfkit.git#egg=pdfkit'
+	],
 	cmdclass = \
 	{
 		'clean': CleanCommand