[Proposed]
Remove reference to X-HTTP-Method header
Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47304/latest/odata_meeting-13_on-20121025-minutes.html
https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47501/odata-core-v1.0-wd01-part1-protocol-2012-11-16.doc
Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47595/latest/odata-meeting-16_on-20121129-minutes.html
Section 10.5.1 Batch Request Headers refers to the X-HTTP-Method header that is not defined in section 8.