meta-ibm: utilize new webui IMAGE_FEATURE

Remove RDEPENDS usage to bring in the webui and move to the new
IMAGE_FEATURE

Tested:
- Confirmed system1 has webui

Change-Id: I942509a3b5db2de8caf693f81f78850afd90f58d
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-ibm/meta-romulus/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend b/meta-ibm/meta-romulus/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
index 8c1ac67..f1b7903 100644
--- a/meta-ibm/meta-romulus/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
+++ b/meta-ibm/meta-romulus/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
@@ -1,2 +1,2 @@
 RDEPENDS:${PN}-inventory:append:romulus = " openpower-occ-control id-button"
-RDEPENDS:${PN}-extras:append:romulus = " webui-vue phosphor-image-signing"
+RDEPENDS:${PN}-extras:append:romulus = " phosphor-image-signing"