Remove legacy BMC code update services

The services in obmc-flash-bmc and obmc-mgr-download are deprecated,
remove them.

Tested: Verify the legacy services are not built; and code update works
        with APIs described in
        https://github.com/openbmc/phosphor-dbus-interfaces/tree/master/xyz/openbmc_project/Software

(From meta-phosphor rev: 005193d919d7d05c1dd83e9fa429805badf9ef15)

Change-Id: Ia462768c51ba5ed1cc1d8523552f6c9570b0877e
Signed-off-by: Lei YU <mine260309@gmail.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bb b/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bb
index e25a1f2..c783d00 100644
--- a/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bb
+++ b/meta-phosphor/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bb
@@ -101,11 +101,7 @@
         ${VIRTUAL-RUNTIME_obmc-sensors-hwmon} \
         "
 
-# These packages are not required with UBI enabled
-${PN}-software-extras = " \
-        obmc-flash-bmc \
-        obmc-mgr-download \
-        "
+${PN}-software-extras = ""
 
 ${PN}-software-extras_df-obmc-ubi-fs = " \
         phosphor-image-signing \