chrome/settings/lockScreen: Remove dead code for SmartLock.

R=tommycli@chomium.org

Bug: none
Test: none
Change-Id: I5c46c27a977535802f15c8e89e7945327fb4ef7c
Reviewed-on: https://chromium-review.googlesource.com/1188895Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586433}

chrome/browser/resources/settings/people_page/lock_screen.js

@@ -417,16 +417,6 @@ Polymer({
     return enabled ? enabledStr : disabledStr;
   },
 
-  /**
-   * @param {boolean} easyUnlockEnabled
-   * @param {boolean} proximityDetectionAllowed
-   * @private
-   */
-  getShowEasyUnlockToggle_: function(
-      easyUnlockEnabled, proximityDetectionAllowed) {
-    return easyUnlockEnabled && proximityDetectionAllowed;
-  },
-
   /** @private */
   updateNumFingerprints_: function() {
     if (this.fingerprintUnlockEnabled_ && this.fingerprintBrowserProxy_) {