meta-openpower: phosphor-dbus-interfaces: remove unused bbappend

The flags set by this bbappend are now handled automatically by the
phosphor-dbus-interfaces recipe.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ib2b9cd42900b5c9efbca693651b3cfc4dd59d676
diff --git a/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend b/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend
deleted file mode 100644
index cab0c9b..0000000
--- a/recipes-phosphor/dbus/phosphor-dbus-interfaces_%.bbappend
+++ /dev/null
@@ -1 +0,0 @@
-EXTRA_OECONF += " --enable-openpower-dbus-interfaces"