Removes irrelevant links to HTTP definition.

Removes sentence "For a complete description of HTTP 1.1 header definitions, see Header Field Definitions." from several pages on ch02, object-api, stored in wadl files

Change-Id: If574799dddbd79d49984041e9d51603feae2d669
Closes-bug: #1332008
Merge "Removes irrelevant links to HTTP definition."