Revert "Chrome OS: Send board name for the first (owner) user only"

This reverts commit 7930c989.

Reason for revert: reasons were reconsidered

Original change's description:
> Chrome OS: Send board name for the first (owner) user only
> 
> Bug: 967600
> Change-Id: I312ccfd2e11cb1c2290ae05a1c32270035dff7a6
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1632157
> Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
> Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#663839}

TBR=xiyuan@chromium.org,rsorokin@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 967600
Change-Id: I5deae35ef82304f869fada7af445a534858cc13e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2325613Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792639}

chrome/browser/resources/gaia_auth_host/authenticator.js

@@ -641,12 +641,11 @@ cr.define('cr.login', function() {
         url = appendParam(url, 'mi', 'ee');
       }
 
+      if (data.lsbReleaseBoard) {
+        url = appendParam(url, 'chromeos_board', data.lsbReleaseBoard);
+      }
       if (data.isFirstUser) {
         url = appendParam(url, 'is_first_user', 'true');
-
-        if (data.lsbReleaseBoard) {
-          url = appendParam(url, 'chromeos_board', data.lsbReleaseBoard);
-        }
       }
       if (data.obfuscatedOwnerId) {
         url = appendParam(url, 'obfuscated_owner_id', data.obfuscatedOwnerId);