meta-facebook: remove excess override syntaxes

When a bbappend file is already in a meta-machine layer, there is no
reason for extra ":machine" override syntax usage.  Remove them all.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I610e72633adb5bc36b63fe2b727e394c61070185
diff --git a/meta-facebook/meta-harma/recipes-phosphor/configuration/entity-manager_%.bbappend b/meta-facebook/meta-harma/recipes-phosphor/configuration/entity-manager_%.bbappend
index 03f1c63..6e89557 100644
--- a/meta-facebook/meta-harma/recipes-phosphor/configuration/entity-manager_%.bbappend
+++ b/meta-facebook/meta-harma/recipes-phosphor/configuration/entity-manager_%.bbappend
@@ -1,9 +1,9 @@
-FILESEXTRAPATHS:prepend:harma := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 
-SRC_URI:append:harma = " \
+SRC_URI:append = " \
     file://blacklist.json \
     "
 
-do_install:append:harma () {
+do_install:append() {
     install -m 0644 -D ${WORKDIR}/blacklist.json ${D}${datadir}/${PN}/blacklist.json
 }