Remove HISTORY.rst from pypi release page (#69)

It's no longer updated, so don't bother adding it to the description:
- https://pypi.org/project/pytrakt/4.0.2/

Author: glensc

setup.py

@@ -6,8 +6,6 @@
 
 with open('README.rst') as f:
     readme = f.read()
-with open('HISTORY.rst') as f:
-    history = f.read()
 with open('requirements.txt') as f:
     requires = [line.strip() for line in f if line.strip()]
 
@@ -19,7 +17,7 @@
     name='pytrakt',
     version=trakt.__version__,
     description=description,
-    long_description='\n'.join([readme, history]),
+    long_description=readme,
     author='Elan Ruusamäe',
     author_email='[email protected]',
     url='https://github.com/glensc/python-pytrakt',