cros: Remove supervised user methods from SystemTrayDelegate

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 4c9541cb860819aae026d104dbed20281b835e71..70cd53b600246367fcba755f11c59301c39054cb 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -2062,15 +2062,6 @@ Press any key to continue exploring.
   <message name="IDS_CREATE_SUPERVISED_USER_CREATION_CREATION_TIMEOUT_MESSAGE" desc="Text shown at the place of progess indicator if creation takes too long and should be cancelled.">
     This is taking much longer than usual. You can keep waiting, or cancel and try again later.
   </message>
-  <message name="IDS_USER_IS_SUPERVISED_BY_NOTICE" desc="Text for notifications showing that this user is supervised">
-    Usage and history of this user can be reviewed by the manager (<ph name="MANAGER_EMAIL">$1<ex>user@example.com</ex></ph>) on chrome.com.
-  </message>
-  <message name="IDS_CHILD_USER_IS_MANAGED_BY_ONE_PARENT_NOTICE" desc="Text for notifications showing that this child user is managed by parent's account.">
-    This is an account for kids managed by <ph name="MANAGER_EMAIL">$1<ex>user@example.com</ex></ph>
-  </message>
-  <message name="IDS_CHILD_USER_IS_MANAGED_BY_TWO_PARENTS_NOTICE" desc="Text for notifications showing that this child user is managed by two parents' accounts.">
-    This is an account for kids managed by <ph name="FIRST_PARENT_EMAIL">$1<ex>first@example.com</ex></ph> and <ph name="SECOND_PARENT_EMAIL">$2<ex>second@example.com</ex></ph>
-  </message>
   <message name="IDS_SUPERVISED_USER_EXPIRED_TOKEN_WARNING" desc="Warning text that is shown on login screen trying to sign in as a supervised user that has expired token">
     This supervised user may have been deleted or disabled by the manager. Please contact the manager if you would like to continue signing in as this user.
   </message>