Remove checking of Accept-Range header

Some tests fail when Accept-Range header is not present in the
response of the API. This is not necesseary as the Accept-Range
header is not mandatory according to RFC [1].

[2] https://tools.ietf.org/html/rfc7233#section-2.3

Closes-Bug: #1885723
Change-Id: I521eb4a332937328b5010df53ddab2af76090202
1 file changed