XWIKI-9674: Stop supporting URL rewriting when cookies are turned off
* Revert "XWIKI-9610: BlogRss page generates a RSS feed with jsession id in URLs"

This reverts commit 42c5dca90587169ac699dff0ecb69895255b3f6f.
XWIKI-9674: Stop supporting URL rewriting when cookies are turned off
* Revert since it's no longer needed