soc/amd/commonn/block/include/psp_efs.h: Remove unused function

Commit 49d8aa7043ea ("soc/amd/common/block/psp: Unmap EFS region after
use") removed the 'efs_is_valid' function but left the function
signature in the header file.

TEST=stoney/picasso/cezanne/mendocino/phoenix builds

Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: Ib596946679b50be63868af57e3428b4d65845419
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76750
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

0 files changed, 0 insertions, 0 deletions