config: ignore deprecated warning in tests (#389)
config: ignore deprecated warning in tests (#389)

(*CertPool).Subjects is deprecated in Go 1.18 because it may not include
the system certs but it isn't a problem for the tests because we're not
loading the system certs.

Signed-off-by: Simon Pasquier <38e2d22e48be18381a59028f88390cad04670376@redhat.com>
prometheus/common