Removed deprecated bs-callout markup in cohorts table

app/views/admin/cohorts/_cohorts_table.html.haml

 - number_of_data_columns = @cohorts[:months_included] - 1
-.bs-callout.clearfix
-  %p
-    = s_("Cohorts|User cohorts are shown for the last %{months_included} months. Only users with activity are counted in the 'New users' column; inactive users are counted separately.") % { months_included: @cohorts[:months_included] }
-    = link_to sprite_icon('question-o'), help_page_path('administration/user_cohorts', anchor: 'cohorts'), title: 'About this feature', target: '_blank', rel: 'noopener noreferrer'
 
-.table-holder.d-xl-table
+.table-holder.d-xl-table.gl-mt-5
   %table.table
     %thead
       %tr
         %th.border-right.pt-4{ colspan: 3 }
+          = s_("Cohorts|New users")
         %th.font-weight-bold.pt-4{ colspan: number_of_data_columns }
           = s_("Cohorts|Returning users")
       %tr
@@ -17,7 +14,7 @@
         %th.border-top-0
           = s_("Cohorts|Inactive users")
         %th.border-top-0.border-right
-          = s_("Cohorts|New users")
+          = s_("Cohorts|Active users")
         - number_of_data_columns.times do |i|
           %th.border-top-0
             = s_("Cohorts|Month %{month_index}") % { month_index: i + 1 }

locale/gitlab.pot

@@ -12219,6 +12219,9 @@ msgstr ""
 msgid "CodeownersValidation|Zero owners"
 msgstr ""
+msgid "Cohorts|Active users"
+msgstr ""
+
 msgid "Cohorts|Inactive users"
 msgstr ""
@@ -12234,9 +12237,6 @@ msgstr ""
 msgid "Cohorts|Returning users"
 msgstr ""
-msgid "Cohorts|User cohorts are shown for the last %{months_included} months. Only users with activity are counted in the 'New users' column; inactive users are counted separately."
-msgstr ""
-
 msgid "Collapse"
 msgstr ""