remove ldap on witherspoon

openbmc master has exceeded the available flash space on witherspoon.
Remove LDAP so it fits again and we can continue to use witherspoon for
HW CI validation of openbmc master commits.

IBM has forked off its own openbmc repo for maintenance of customer
witherspoon systems. Therefore it is not necessary for openbmc
master to continue to support everything.

Tested:
- Verified generated image flashes on witherspoon and HW CI tests passed
- obmc-phosphor-image-witherspoon.squashfs-xz 19.27MB -> 18.53MB

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: If6ba5b5c7e2774ec028db3e5941a0f40b62f1ded
diff --git a/recipes-phosphor/images/obmc-phosphor-image.bbappend b/recipes-phosphor/images/obmc-phosphor-image.bbappend
index 0fb880f..4bcaf75 100644
--- a/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -1,3 +1,6 @@
 OBMC_IMAGE_EXTRA_INSTALL_append_ibm-ac-server = " mboxd max31785-msl phosphor-msl-verify liberation-fonts uart-render-controller first-boot-set-hostname"
 OBMC_IMAGE_EXTRA_INSTALL_append_rainier = " mboxd"
 OBMC_IMAGE_EXTRA_INSTALL_append_mihawk = " mboxd liberation-fonts uart-render-controller "
+
+# remove so things fit in available flash space
+IMAGE_FEATURES_remove_witherspoon = "obmc-user-mgmt-ldap"