meta-openembedded and poky: subtree updates

Squash of the following due to dependencies among them
and OpenBMC changes:

meta-openembedded: subtree update:d0748372d2..9201611135
meta-openembedded: subtree update:9201611135..17fd382f34
poky: subtree update:9052e5b32a..2e11d97b6c
poky: subtree update:2e11d97b6c..a8544811d7

The change log was too large for the jenkins plugin
to handle therefore it has been removed. Here is
the first and last commit of each subtree:

meta-openembedded:d0748372d2
      cppzmq: bump to version 4.6.0
meta-openembedded:17fd382f34
      mpv: Remove X11 dependency
poky:9052e5b32a
      package_ipk: Remove pointless comment to trigger rebuild
poky:a8544811d7
      pbzip2: Fix license warning

Change-Id: If0fc6c37629642ee207a4ca2f7aa501a2c673cd6
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/poky/meta/lib/oe/packagegroup.py b/poky/meta/lib/oe/packagegroup.py
index 2419cbb..8fcaecd 100644
--- a/poky/meta/lib/oe/packagegroup.py
+++ b/poky/meta/lib/oe/packagegroup.py
@@ -5,17 +5,11 @@
 import itertools
 
 def is_optional(feature, d):
-    packages = d.getVar("FEATURE_PACKAGES_%s" % feature)
-    if packages:
-        return bool(d.getVarFlag("FEATURE_PACKAGES_%s" % feature, "optional"))
-    else:
-        return bool(d.getVarFlag("PACKAGE_GROUP_%s" % feature, "optional"))
+    return bool(d.getVarFlag("FEATURE_PACKAGES_%s" % feature, "optional"))
 
 def packages(features, d):
     for feature in features:
         packages = d.getVar("FEATURE_PACKAGES_%s" % feature)
-        if not packages:
-            packages = d.getVar("PACKAGE_GROUP_%s" % feature)
         for pkg in (packages or "").split():
             yield pkg