MD Settings: drop confusing "Enable guest browsing" secondary text

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- About Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PAGE_DETAILED_BUILD_INFO" desc="Label describing the section that shows detailed information about the current Chrome build.">
       Detailed build information
     </message>
     <message name="IDS_SETTINGS_ABOUT_PAGE_ARC_VERSION" desc="Label for ARC version">
       ARC Version
@@ skipping 2004 matching lines @@
     Cache Storage
   </message>
 
   <!-- Sync / People Page -->
   <message name="IDS_SETTINGS_PEOPLE" desc="Name of the settings page which manages Chrome's signed-in Google profile.">
     People
   </message>
   <message name="IDS_SETTINGS_PEOPLE_MANAGE_OTHER_PEOPLE" desc="Label for the button that opens the multi-profile user manager.">
     Manage other people
   </message>
-  <message name="IDS_SETTINGS_PEOPLE_MANAGE_OTHER_PEOPLE_DESCRIPTION" desc="Description for the button that opens the multi-profile user manager.">
-    Enable guest browsing
-  </message>
   <message name="IDS_SETTINGS_PEOPLE_MANAGE_SUPERVISED_USERS" desc="Label for the button that opens the supervised users dashboard.">
     Manage supervised users
   </message>
   <message name="IDS_SETTINGS_PEOPLE_MANAGE_SUPERVISED_USERS_DESCRIPTION" desc="Description for the button that opens the supervised users dashboard.">
     Opens Supervised Users Dashboard
   </message>
   <message name="IDS_SETTINGS_CHANGE_PICTURE_PROFILE_PHOTO" desc="The text on the Google profile photo of the user.">
     Google Profile photo
   </message>
 
@@ skipping 634 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>