Remove unused imports

All imported modules that were note used in examples
    have been removed.

examples/add_tracks_to_playlist.py

@@ -1,7 +1,6 @@
 
 # Adds tracks to a playlist
 
-import pprint
 import sys
 
 import spotipy

examples/create_playlist.py

@@ -2,8 +2,6 @@
 
 import pprint
 import sys
-import os
-import subprocess
 
 import spotipy
 import spotipy.util as util

examples/errors.py

@@ -2,10 +2,7 @@
 
 from __future__ import print_function    # (at top of module)
 from spotipy.oauth2 import SpotifyClientCredentials
-import json
 import spotipy
-import time
-import sys
 
 
 client_credentials_manager = SpotifyClientCredentials()

examples/my_playlists.py

@@ -1,11 +1,9 @@
 # Shows the top artists for a user
 
-import pprint
 import sys
 
 import spotipy
 import spotipy.util as util
-import simplejson as json
 
 if len(sys.argv) > 1:
     username = sys.argv[1]

examples/show_artist_top_tracks.py

@@ -2,7 +2,6 @@
 
 import spotipy
 import sys
-import pprint
 
 if len(sys.argv) > 1:
     urn = sys.argv[1]

examples/show_featured_playlists.py

@@ -2,7 +2,6 @@
 
 import spotipy
 import sys
-import pprint
 import spotipy.util as util
 
 if len(sys.argv) > 1:

examples/show_new_releases.py

@@ -2,7 +2,6 @@
 
 import spotipy
 import sys
-import pprint
 import spotipy.util as util
 
 if len(sys.argv) > 1:

examples/show_related.py

@@ -3,7 +3,6 @@
 
 import spotipy
 import sys
-import pprint
 
 if len(sys.argv) > 1:
     artist_name = sys.argv[1]

examples/user_playlists.py

@@ -1,9 +1,6 @@
 # shows a user's playlists (need to be authenticated via oauth)
 
-import pprint
 import sys
-import os
-import subprocess
 
 import spotipy