9583 loader: remove devdesc comments and assertions
Review Request #1099 - Created June 6, 2018 and submitted - Latest diff uploaded
FreeBSD change: https://svnweb.freebsd.org/base?view=revision&revision=334695 Remove comments and assertions that are no longer valid after r330809. r330809 replaced duplication of devdesc struct fields with an embedded copy of the devdesc struct, to avoid fragility. That means all the scattered comments indicating that structs must match are no longer valid. Likewise asserts that attempted to mitigate some of the old fragility.