Remove Cipher suite 3 from cipher list

Reason: For security reason- HMAC-SHA1 is deprecated.

Plesae note: Use latest ipmitool or ipmitool v1.8.18.177.g7ccea28 later

Tested:
ipmitool lan print <channel>
Should not list cipher 3 as supported.

(From meta-phosphor rev: 72dbf6344b9abeae6bdc3c721359eef9ec5f67bd)

Signed-off-by: Suryakanth Sekar <suryakanth.sekar@linux.intel.com>
Change-Id: Idfb3d0f014e3b1e1155be98fac4df741dc97115e
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>

meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-config/cipher_list.json

@@ -1,10 +1,4 @@
 {
-    "a":{
-        "cipher":3,
-        "authentication":1,
-        "integrity":1,
-        "confidentiality":1
-    },
     "b":{
         "cipher":17,
         "authentication":3,