diff --git a/tempest/services/image/v1/json/images_client.py b/tempest/services/image/v1/json/images_client.py
index b45ca22..c157996 100644
--- a/tempest/services/image/v1/json/images_client.py
+++ b/tempest/services/image/v1/json/images_client.py
@@ -14,9 +14,7 @@
 #    under the License.
 
 import copy
-import errno
 import functools
-import os
 
 from oslo_log import log as logging
 from oslo_serialization import jsonutils as json
@@ -68,35 +66,6 @@
             headers['x-image-meta-%s' % key] = str(value)
         return headers
 
-    def _get_file_size(self, obj):
-        """Analyze file-like object and attempt to determine its size.
-
-        :param obj: file-like object, typically redirected from stdin.
-        :retval The file's size or None if it cannot be determined.
-        """
-        # For large images, we need to supply the size of the
-        # image file. See LP Bugs #827660 and #845788.
-        if hasattr(obj, 'seek') and hasattr(obj, 'tell'):
-            try:
-                obj.seek(0, os.SEEK_END)
-                obj_size = obj.tell()
-                obj.seek(0)
-                return obj_size
-            except IOError as e:
-                if e.errno == errno.ESPIPE:
-                    # Illegal seek. This means the user is trying
-                    # to pipe image data to the client, e.g.
-                    # echo testdata | bin/glance add blah..., or
-                    # that stdin is empty, or that a file-like
-                    # object which doesn't support 'seek/tell' has
-                    # been supplied.
-                    return None
-                else:
-                    raise
-        else:
-            # Cannot determine size of input image
-            return None
-
     def _create_with_data(self, headers, data):
         # We are going to do chunked transfert, so split the input data
         # info fixed-sized chunks.