Removed sytemd_target meson option value passed from bb file.

The following patch is submitted to set the default value in the
phosphor-host-postd repo.
https://gerrit.openbmc.org/c/openbmc/phosphor-host-postd/+/53836

TESTED : Built Facebook YosemiteV2 images and loaded on
the target hardware. Verified all four host postcodes are
displayed.

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Change-Id: Ie5174107c4f1c3e9342b12b86b789e23301731a2
diff --git a/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb b/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
index f494914..717f572 100644
--- a/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
+++ b/meta-phosphor/recipes-phosphor/host/phosphor-host-postd_git.bb
@@ -34,7 +34,6 @@
 EXTRA_OEMESON:append = " \
     -Dsnoop-device=${SNOOP_DEVICE} \
     -Dpost-code-bytes=${POST_CODE_BYTES} \
-    -Dsystemd-target=multi-user.target \
     -Dtests=disabled \
 "