Remove a collapsible-if clippy allow
Remove a collapsible-if clippy allow

clippy does not seem to be enforcing its opinions as strongly as
formerly.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

stratis-storage/stratisd,stratis-storage/stratisd,stratis-storage/stratisd