meta-phosphor: drop dead code

This function isn't used where, so drop.

(From meta-phosphor rev: 8505f065b61291c628b23e593a7bc05c6db64e4e)

Change-Id: If961d3422758af4bcd75069fa695fabe2df01f56
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-phosphor/classes/obmc-phosphor-utils.bbclass b/meta-phosphor/classes/obmc-phosphor-utils.bbclass
index 7568461..a8f7175 100644
--- a/meta-phosphor/classes/obmc-phosphor-utils.bbclass
+++ b/meta-phosphor/classes/obmc-phosphor-utils.bbclass
@@ -23,11 +23,3 @@
     lists = [listvar_to_list(d, x) for x in listvars]
     lst = [fmt.format(*x) for x in zip(*lists)]
     return (kw.get('sep') or ' ').join(lst)
-
-
-def append_suffix(val, suffix):
-    words = val.split(' ')
-    newval = []
-    for w in words:
-        newval.append(w + suffix)
-    return ' '.join(newval)