package/postgresql: remove stale IGNORE_CVES

Since Buildroot commit [1] the CVEs are no longer matched to CPEs with
versions using '-'.

The CVE-2017-8806 is then no longer matched to the postgresql package.

For more information, see the explanation in commit [1].

[1] 35f376d88e support/scripts/cve.py: fix CPE matching

Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Reviewed-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/postgresql/postgresql.mk

@@ -28,10 +28,6 @@ POSTGRESQL_DEPENDENCIES = \
 	host-bison \
 	host-flex
 
-# CVE-2017-8806 is related to postgresql-common package
-# It is false positive for postgresql
-POSTGRESQL_IGNORE_CVES += CVE-2017-8806
-
 ifeq ($(BR2_PACKAGE_POSTGRESQL_FULL),y)
 POSTGRESQL_NINJA_OPTS += world
 POSTGRESQL_INSTALL_TARGET_OPTS += DESTDIR=$(TARGET_DIR) install-world