resources: remove duplicated keys from GAPBS' packer script

Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Change-Id: Ib5531a3e036a106447343c3f5c5870d80757ace6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/34455
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby R. Bruce <bbruce@ucdavis.edu>
diff --git a/src/gapbs/disk-image/gapbs/gapbs.json b/src/gapbs/disk-image/gapbs/gapbs.json
index aefa3ef..b152761 100644
--- a/src/gapbs/disk-image/gapbs/gapbs.json
+++ b/src/gapbs/disk-image/gapbs/gapbs.json
@@ -91,8 +91,6 @@
         "preseed" : "preseed.cfg",
         "hostname": "gem5",
         "ssh_fullname": "gem5",
-        "hostname": "gem5",
-        "ssh_fullname": "gem5",
         "ssh_password": "12345",
         "ssh_username": "gem5",
         "vm_cpus": "16",