LINT: Remove DTrace support

Ensure we have at least one commonly built kernel config that does not include
DTrace.
This is intended to help detect issues such as 45d108ee14 where a variable is
only used for static probe point, resulting in build failures when DTrace is
disabled.

Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D47821