meta-phosphor: skeleton: obmc-libobmc-intf: drop preferred

Drop preferred version for obmc-libobmc-intf.

Change-Id: Iae885b802a0d15b33e0ea435d481f2eb3d7af90b
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/conf/distro/include/phosphor-defaults.inc b/conf/distro/include/phosphor-defaults.inc
index 56b0fea..ed2cd74 100644
--- a/conf/distro/include/phosphor-defaults.inc
+++ b/conf/distro/include/phosphor-defaults.inc
@@ -244,5 +244,3 @@
 # Will add a build dependency to host-ipmid on the
 # phosphor-ipmi-fru-whitelist-native recipe.
 VIRTUAL-RUNTIME_phosphor-ipmi-providers ?= "phosphor-ipmi-fru"
-
-PREFERRED_VERSION_obmc-libobmc-intf = "1.0"