Remove Object Storage Guide from trunk index page

The guide has been removed, drop a reference to it.

Change-Id: Ieac1dafd34e100700f04b6ec2b4695496bfded91
Fix typos in Hyper V description

Change-Id: Ia793907b46487b346e43d347a1a82c5df9c559d5
Merge "Fix typos in Hyper V description"