phosphor-base.inc: remove old pygobject PREFERRED_VERSION

We do not use pygobject any more and the PREFERRED_VERSION does
not even exist (python2-based).

(From meta-phosphor rev: 6d6e2b31f98363c39b9b94cd1bdfb518e7669382)

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8856b0900a1cdb6140b741c3a9639099f1154102
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-base.inc b/meta-phosphor/conf/distro/include/phosphor-base.inc
index 8d53c8d..297b2d3 100644
--- a/meta-phosphor/conf/distro/include/phosphor-base.inc
+++ b/meta-phosphor/conf/distro/include/phosphor-base.inc
@@ -124,9 +124,6 @@
 
 DISTRO_EXTRA_RDEPENDS_remove_qemuarm = "packagegroup-core-device-devel"
 
-# TODO: openbmc/openbmc#12345 - Upgrade to pygobject-3.
-PREFERRED_VERSION_python-pygobject = "2.%"
-
 include conf/distro/include/openbmc-phosphor/${MACHINE}.inc
 
 KERNEL_FEATURES_append = " phosphor-gpio-keys"