Revert "Added Saltconf banner to docs sidebar"

This reverts commit 70be208bc555e0b3f61419e5a041200b2235f080.

Conflicts:
	doc/_themes/saltstack/layout.html
Revert "Added SaltConf banner to main docs page"

This reverts commit 9834a9afdace80746ab023d402a01f1dbe226eba.

Conflicts:
	doc/_static/saltconf.jpg
	doc/index.rst
Merge pull request #10177 from whiteinge/remove-saltconf-banner

Remove saltconf banner