meta-inspur: fp5280g2: Remove duplicate configuration

`install -d ${D}${sysconfdir}/default` has been configured
in the libmctp_git.bb file, remove it.

Tested:
1. Successfully build libmctp and image-bmc
2. Saw the `/etc/default/mctp` file in image-bmc

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I162d10b4a09ebe87388f4e3e4d9f79aa32a94230
diff --git a/meta-inspur/meta-fp5280g2/recipes-phosphor/libmctp/libmctp_%.bbappend b/meta-inspur/meta-fp5280g2/recipes-phosphor/libmctp/libmctp_%.bbappend
index af2869b..5418cd7 100644
--- a/meta-inspur/meta-fp5280g2/recipes-phosphor/libmctp/libmctp_%.bbappend
+++ b/meta-inspur/meta-fp5280g2/recipes-phosphor/libmctp/libmctp_%.bbappend
@@ -5,6 +5,5 @@
 PACKAGECONFIG:append:fp5280g2 = " astlpc-raw-kcs"
 
 do_install:append() {
-	install -d ${D}${sysconfdir}/default
 	install -m 0644 ${WORKDIR}/mctp ${D}${sysconfdir}/default/mctp
 }