spec: remove 'version' from Result addresses

Redundant and easily determined from the address itself.

Signed-off-by: Dan Williams <dcbw@redhat.com>

SPEC.md

@@ -29,7 +29,7 @@
 
 ## Version
 
-This is CNI **spec** version **0.4.0**.
+This is CNI **spec** version **1.0.0 pre-release** and is still under active development.
 
 Note that this is **independent from the version of the CNI library and plugins** in this repository (e.g. the versions of [releases](https://github.com/containernetworking/cni/releases)).
 
@@ -676,7 +676,6 @@ Success must be indicated by a zero return code and the following JSON being pri
   "cniVersion": "0.4.0",
   "ips": [
       {
-          "version": "<4-or-6>",
           "address": "<ip-and-prefix-in-CIDR>",
           "gateway": "<ip-address-of-the-gateway>"  (optional)
       },
@@ -728,7 +727,6 @@ IPAM plugin examples:
 ```
   "ips": [
       {
-          "version": "<4-or-6>",
           "address": "<ip-and-prefix-in-CIDR>",
           "gateway": "<ip-address-of-the-gateway>",      (optional)
           "interface": <numeric index into 'interfaces' list> (not required for IPAM plugins)
@@ -740,8 +738,6 @@ IPAM plugin examples:
 The `ips` field is a list of IP configuration information determined by the plugin. Each item is a dictionary describing of IP configuration for a network interface.
 IP configuration for multiple network interfaces and multiple IP configurations for a single interface may be returned as separate items in the `ips` list.
 All properties known to the plugin should be provided, even if not strictly required.
-- `version` (string): either "4" or "6" and corresponds to the IP version of the addresses in the entry.
-   All IP addresses and gateways provided must be valid for the given `version`.
 - `address` (string): an IP address in CIDR notation (eg "192.168.1.3/24").
 - `gateway` (string): the default gateway for this subnet, if one exists.
    It does not instruct the CNI plugin to add any routes with this gateway: routes to add are specified separately via the `routes` field.