Shows the account activation message in the sidebar

and removes the DISPLAY_ACCOUNT_ACTIVATION_MESSAGE_ON_SIDEBAR flag, since this
feature is now always on.

Marks the top banner as deprecated.

(cherry picked from commit b44114d171)

lms/envs/common.py

@@ -375,9 +375,6 @@ FEATURES = {
     # See LEARNER-493
     'ENABLE_ONE_CLICK_PROGRAM_PURCHASE': False,
 
-    # Whether to display account activation notification on dashboard.
-    'DISPLAY_ACCOUNT_ACTIVATION_MESSAGE_ON_SIDEBAR': False,
-
     # Allow users to change their email address.
     'ALLOW_EMAIL_ADDRESS_CHANGE': True,
 

lms/templates/registration/activate_account_notice.html

@@ -1,28 +0,0 @@
-<%page expression_filter="h"/>
-<%!
-from django.utils.translation import ugettext as _
-from openedx.core.djangolib.markup import HTML, Text
-%>
-<div class="wrapper-msg urgency-high">
-  <div class="msg">
-    <div class="msg-content">
-      <h2 class="title">${_("You're almost there!")}</h2>
-      <div class="copy">
-        <p class='activation-message'>${Text(_(
-          "There's just one more step: Before you "
-          "enroll in a course, you need to activate "
-          "your account. We've sent an email message to "
-          "{email_start}{email}{email_end} with "
-          "instructions for activating your account. If "
-          "you don't receive this message, check your "
-          "spam folder."
-          )).format(
-            email_start=HTML("<strong>"),
-            email_end=HTML("</strong>"),
-            email=email,
-        )}
-        </p>
-      </div>
-    </div>
-  </div>
-</div>