shadow: Remove local subid support as it was merged in oe-core

Merged in oe-core, kirkstone 5cdc9c1809ef169b8af7ce3085f316d1e68eb7ec.
This revision is included in the last oe-core bump.

Related to eclipse/oniro-core/oniro#772



Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/recipes-extended/shadow/shadow_%.bbappend

@@ -10,11 +10,3 @@
 # -Werror=format-nonliteral globally in OPTIMIZE_FOR=security mode
 # while keeping shadow building.
 TARGET_CFLAGS:remove = "-Werror=format-nonliteral"
-
-do_install:append () {
-	# usermod requires the subuid/subgid files to be in place before being
-	# able to use the -v/-V flags otherwise it fails:
-	# usermod: /etc/subuid does not exist, you cannot use the flags -v or -V
-	touch ${D}${sysconfdir}/subuid
-	touch ${D}${sysconfdir}/subgid
-}