meta-phosphor: distro: remove user-mgmt

Remove the obmc-phosphor-user-mgmt distro feature.

It doesn't have any references in any upstream metadata.

Change-Id: I7b9d4b760ede08d8857d643751835b9235a018ae
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/conf/distro/include/phosphor-base.inc b/conf/distro/include/phosphor-base.inc
index 25672ef..80b23b4 100644
--- a/conf/distro/include/phosphor-base.inc
+++ b/conf/distro/include/phosphor-base.inc
@@ -101,7 +101,6 @@
         obmc-phosphor-fan-mgmt \
         obmc-phosphor-flash-mgmt \
         obmc-phosphor-system-mgmt \
-        obmc-phosphor-user-mgmt \
         obmc-settings-mgmt \
         "