Revert "gddo-server/assets: bold redirect text"

This reverts commit b853219a43322d594dd40c07d3a5ba6e4e35b2fc.

Reason for revert: split deploy of teeproxy and banner changes

Revert CL 275872.

Change-Id: I8176626e2232066f8a481ee6735e8e633b3af642
Reviewed-on: https://go-review.googlesource.com/c/gddo/+/277113
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>