Removed useless import.

src/zc/buildout/download.py

@@ -40,8 +40,7 @@ class ChecksumError(zc.buildout.UserError):
 url_opener = URLOpener()
 
 
-from zc.buildout.networkcache import get_sha256sum_from_networkcached, \
-                                     download_network_cached, \
+from zc.buildout.networkcache import download_network_cached, \
                                      upload_network_cached
 
 
@@ -180,27 +179,25 @@ class Download(object):
         self.logger.info('Downloading %s' % url)
         urllib._urlopener = url_opener
         handle, tmp_path = tempfile.mkstemp(prefix='buildout-')
+
         try:
-            if not download_network_cached(self.network_cache, tmp_path,
-                                                        url, self.logger):
-
-                # Download from original url
-                tmp_path, headers = urllib.urlretrieve(url, tmp_path)
-                if not check_md5sum(tmp_path, md5sum):
-                    raise ChecksumError(
-                        'MD5 checksum mismatch downloading %r' % url)
-                # Upload the file to networkcached.
-                upload_network_cached(self.network_cache, url,
-                                                     tmp_path, self.logger)
-        except IOError, e:
-            os.remove(tmp_path)
-            raise zc.buildout.UserError("Error downloading extends for URL "
-                              "%s: %r" % (url, e[1:3]))
-        except Exception, e:
+            try:
+                if not download_network_cached(self.network_cache, tmp_path,
+                                                            url, self.logger):
+
+                    # Download from original url
+                    tmp_path, headers = urllib.urlretrieve(url, tmp_path)
+                    if not check_md5sum(tmp_path, md5sum):
+                        raise ChecksumError(
+                            'MD5 checksum mismatch downloading %r' % url)
+                    # Upload the file to networkcached.
+                    upload_network_cached(self.network_cache, url,
+                                                         tmp_path, self.logger)
+            finally:
+                os.close(handle)
+        except:
             os.remove(tmp_path)
             raise
-        finally:
-            os.close(handle)
 
         if path:
             shutil.move(tmp_path, path)