Remove unused imports

pypiserver/__main__.py

@@ -12,7 +12,6 @@ import os
 import re
 import sys
 import textwrap
-import warnings
 
 import functools as ft
 

pypiserver/core.py

@@ -1,7 +1,6 @@
 #! /usr/bin/env python
 """minimal PyPI like server for use with pip/easy_install"""
 
-from collections import namedtuple
 import functools
 import hashlib
 import io

tests/test_init.py

@@ -5,7 +5,7 @@ Test module for . . .
 from __future__ import (absolute_import, division,
                         print_function, unicode_literals)
 import logging
-from os.path import abspath, dirname, join, realpath, relpath
+from os.path import abspath, dirname, join, realpath
 from sys import path
 
 # Third party imports