Revert "obmc-console: Allow SOL over SSH only for admin"

As dropbear default value is updated to allow only
priv-admin group users in meta-phosphor, this
restriction will be applied automatically to all
services which uses DROPBEAR_EXTRA_ARGS. As obmc-console
uses dropbear with DROPBEAR_EXTRA_ARGS, the commit, which
adds -G priv-admin to the service file can be removed now
as the same is applied through DROPBEAR_EXTRA_ARGS

This reverts commit 9fe68f9906a99c38758ca9ddaa72432b17841af2.

Change-Id: I7e1fba4535d5cdce71332fb061b9a75c4d672f86
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
diff --git a/recipes-phosphor/console/obmc-console/obmc-console-ssh@.service b/recipes-phosphor/console/obmc-console/obmc-console-ssh@.service
index abd863a..82ffe79 100644
--- a/recipes-phosphor/console/obmc-console/obmc-console-ssh@.service
+++ b/recipes-phosphor/console/obmc-console/obmc-console-ssh@.service
@@ -5,7 +5,7 @@
 [Service]
 Environment="DROPBEAR_RSAKEY_DIR=/etc/dropbear"
 EnvironmentFile={envfiledir}/dropbear
-ExecStart=-/usr/bin/env dropbear -i -r ${{DROPBEAR_RSAKEY_DIR}}/dropbear_rsa_host_key -c "/usr/bin/env obmc-console-client" -G priv-admin $DROPBEAR_EXTRA_ARGS
+ExecStart=-/usr/bin/env dropbear -i -r ${{DROPBEAR_RSAKEY_DIR}}/dropbear_rsa_host_key -c "/usr/bin/env obmc-console-client" $DROPBEAR_EXTRA_ARGS
 SyslogIdentifier=dropbear
 ExecReload={base_bindir}/kill -HUP $MAINPID
 StandardInput=socket