Remove jQuery Migrate (#34337).

git-svn-id: http://svn.redmine.org/redmine/trunk@20871 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -1703,7 +1703,6 @@ module ApplicationHelper
   def javascript_heads
     tags = javascript_include_tag(
       'jquery-3.5.1-ui-1.12.1-ujs-5.2.4.5',
-      'jquery-migrate-3.3.2.min.js',
       'tribute-5.1.3.min',
       'tablesort-5.2.1.min.js',
       'tablesort-5.2.1.number.min.js',