md settings: Remove level of security indicator on lock screen.

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

 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_without_ink.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-radio-group/paper-radio-group.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="easy_unlock_browser_proxy.html">
 <link rel="import" href="easy_unlock_turn_off_dialog.html">
@@ skipping 50 matching lines @@
         <div id="lockOptionsDiv">
           <div class="settings-box">
             <h2>$i18n{lockScreenOptions}</h2>
           </div>
           <div class="list-frame">
             <paper-radio-group id="unlockType"
                 selected="{{selectedUnlockType}}">
               <paper-radio-button name="password" class="list-item underbar">
                 <div class="start">
                   $i18n{lockScreenPasswordOnly}
-                  <div class="secondary">
-                    $i18n{lockScreenHighSecurity}
-                  </div>
                 </div>
               </paper-radio-button>
               <paper-radio-button name="pin+password"
                   class="list-item underbar">
                 <div id="pinPasswordDiv" class="start">
                   $i18n{lockScreenPinOrPassword}
-                  <div class="secondary">
-                    $i18n{lockScreenMediumSecurity}
-                  </div>
                 </div>
                 <template is="dom-if"
                     if="[[showConfigurePinButton_(selectedUnlockType)]]">
                   <div class="separator"></div>
                   <div id="pinPasswordSecondaryActionDiv"
                       class="secondary-action">
                     <paper-button id="setupPinButton" class="secondary-button"
                         on-tap="onConfigurePin_">
                       [[getSetupPinText_(hasPin)]]
                     </paper-button>
@@ skipping 83 matching lines @@
       <template is="dom-if" if="[[showEasyUnlockTurnOffDialog_]]">
         <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog"
             on-close="onEasyUnlockTurnOffDialogClose_">
         </easy-unlock-turn-off-dialog>
       </template>
     </div>
   </template>
 
   <script src="lock_screen.js"></script>
 </dom-module>