libsaria: Remove old cache code

I've replaced it with a cache implemented in libsaria/storage.  The new
cache should be easier to use (or at least easier to maintain and
understand).

libsaria/__init__.py

@@ -5,10 +5,6 @@ import prefs
 import audio
 
 import path
-from path.cache import Cache
-
-# The cache is also saved across sessions
-cache = Cache()
 
 #plugin   = None
 lastfm   = None

libsaria/path/cache.py

@@ -1,52 +0,0 @@
-# Bryan Schumaker (10/23/2010)
-import libsaria
-
-path   = libsaria.path
-expand = path.expand
-mkdir  = path.mkdir
-exists = path.exists
-join   = path.join
-ls     = path.ls
-rm     = path.rm
-sep    = path.sep
-
-CACHE_DIR = join(path.saria_dir(), "cache")
-mkdir(CACHE_DIR)
-
-class CacheObject:
-	def __init__(self, path):
-		self.path = path
-
-	def get(self, key, func, *args):
-		key = key.replace(sep, "_")
-		path = join(self.path, key)
-		if not exists(path):
-			f = open(path, 'w')
-			success = func(f, *args)
-			try:
-				f.close()
-			except:
-				pass
-			if success:
-				return path
-			else:
-				if exists(path):
-					rm(path)
-
-		else:
-			return path
-
-	def delete(self, key):
-		path = join(self.path, key)
-		if exists(path):
-			rm(path)
-
-class Cache:
-	def keys(self):
-		return ls(CACHE_DIR)
-
-	def __getitem__(self, key):
-		key = key.replace(sep, "_")
-		p = join(CACHE_DIR, key)
-		mkdir(p)
-		return CacheObject(p)