meta-phosphor: phosphor-software-manager: drop preferred

Drop preferred version for phosphor-software-manager.

(From meta-phosphor rev: ff01da01dbf6d1671d61deb04be63d1c1fbefa7e)

Change-Id: Icf43892598b2be7d462504a6736bc8d1681dcf65
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-defaults.inc b/meta-phosphor/conf/distro/include/phosphor-defaults.inc
index 6f43501..ed2cd74 100644
--- a/meta-phosphor/conf/distro/include/phosphor-defaults.inc
+++ b/meta-phosphor/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_phosphor-software-manager = "1.0"