rm cache.py, no longer needed

cache.py

@@ -1,13 +0,0 @@
-from app import app
-from flask import g
-import redis
-
-@app.before_request
-def before_request():
-    g.redis = redis.StrictRedis(host='localhost', port=6379, db=0)
-
-@app.teardown_request
-def teardown_request(exc):
-    cache = getattr(g, 'redis', None)
-    if cache is not None:
-        cache.connection_pool.close()