lib/imd: Remove redundant code in imd.c

Get rid of the second check whether r is NULL (this is already done by imdr_has_entry()).

Signed-off-by: Anna Karas <aka@semihalf.com>
Change-Id: Ibee1664ee45b29d36e2eaaa7dff4c7cc1942010b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44663
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>

src/lib/imd.c

@@ -625,9 +625,6 @@ int imd_entry_remove(const struct imd *imd, const struct imd_entry *entry)
 
 	r = imdr_root(imdr);
 
-	if (r == NULL)
-		return -1;
-
 	if (root_is_locked(r))
 		return -1;