[gnome-music] albumArtCache: Remove unused sleep import

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit 646589f11fbad223107f955f84ebb4aadd028760
Author: Vadim Rutkovsky <vrutkovs redhat com>
Date:   Fri Oct 17 00:51:29 2014 +0200

    albumArtCache: Remove unused sleep import

 INSTALL                     |    4 ++--
 gnomemusic/albumArtCache.py |    1 -
 2 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/INSTALL b/INSTALL
index 2099840..007e939 100644
--- a/INSTALL
+++ b/INSTALL
@@ -12,8 +12,8 @@ without warranty of any kind.
 Basic Installation
 ==================
 
-   Briefly, the shell command `./configure && make && make install'
-should configure, build, and install this package.  The following
+   Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package.  The following
 more-detailed instructions are generic; see the `README' file for
 instructions specific to this package.  Some packages provide this
 `INSTALL' file but do not implement all of the features documented
diff --git a/gnomemusic/albumArtCache.py b/gnomemusic/albumArtCache.py
index 8b982b4..41a5a50 100644
--- a/gnomemusic/albumArtCache.py
+++ b/gnomemusic/albumArtCache.py
@@ -34,7 +34,6 @@ import cairo
 from math import pi
 import os
 from threading import Thread
-from time import sleep
 from gnomemusic import log
 from gnomemusic.grilo import grilo
 import logging