CrOS Settings: Network: Remove top line from Metered toggle

Forgot to remove the 'hr' class when moving the toggle to
Advanced in the previous CL.

Bug: 971704
Change-Id: I4167393fc2883dd54b86cc7f61b15973ff31d6cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2327271Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792846}

chrome/browser/resources/settings/chromeos/internet_page/internet_detail_page.html

@@ -291,8 +291,8 @@
             <!-- Metered (WiFi and Cellular only). -->
             <template is="dom-if"
                 if="[[showMetered_(managedProperties_, showMeteredToggle_)]]">
-              <network-config-toggle id="meteredToggle" class="hr"
-                  policy-on-left property="[[managedProperties_.metered]]"
+              <network-config-toggle id="meteredToggle" policy-on-left
+                  property="[[managedProperties_.metered]]"
                   label="$i18n{networkMetered}"
                   sub-label="$i18n{networkMeteredDesc}"
                   checked="{{meteredOverride_}}"