Remove a debugging print statement

This patch removes a debugging print statement that slipped into
service.py in patch https://review.openstack.org/#/c/85453/

Change-Id: I80eee49eaa74b52e9c36f00669206aa7b2cdec9b

swiftclient/service.py

@@ -1898,7 +1898,6 @@ class SwiftService(object):
                         raise part["error"]
 
                     for seg in seg_list:
-                        print(seg)
                         del_seg = segment_pool.submit(
                             self._delete_segment, s_container,
                             seg, results_queue=results_queue