meta-openpower: openpower-fru-vpd: drop preferred

Drop preferred version for openpower-fru-vpd.

Change-Id: I46dca99b6adca1e78c95199b4c44b2e9d9e13577
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/conf/distro/include/openpower-distrovars.inc b/conf/distro/include/openpower-distrovars.inc
index 2b5c090..479e099 100644
--- a/conf/distro/include/openpower-distrovars.inc
+++ b/conf/distro/include/openpower-distrovars.inc
@@ -2,5 +2,3 @@
 DISTRO_FEATURES_FILTER_NATIVE += "openpower"
 DISTRO_FEATURES_FILTER_NATIVESDK += "openpower"
 DISTROOVERRIDES .= ":df-openpower"
-
-PREFERRED_VERSION_openpower-fru-vpd = "1.0"