diff --git a/theme/boost/scss/moodle/admin.scss b/theme/boost/scss/moodle/admin.scss
index 8b0da3a61eb..73edcb9e11a 100644
--- a/theme/boost/scss/moodle/admin.scss
+++ b/theme/boost/scss/moodle/admin.scss
@@ -160,10 +160,6 @@
     margin-bottom: 0.5em;
 }
 
-#page-admin-index .updateplugin .updatepluginconfirmexternal {
-    @extend .tag-warning;
-}
-
 #page-admin-user-user_bulk #users .fgroup {
     white-space: nowrap;
 }
@@ -420,19 +416,6 @@
     text-align: center;
 }
 
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release {
-    @extend .tag-info;
-}
-
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release,
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release {
-    @extend .tag-warning;
-}
-
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release {
-    @extend .tag-danger;
-}
-
 // Plugins overview page at admin/plugins.php
 #page-admin-plugins {
     #plugins-overview-panel {
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index ff9c8d9c967..0e95ec7af5a 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -9480,22 +9480,19 @@ a.dimmed_text:visited,
   .tag-success[href]:hover, .tag-success[href]:focus {
     background-color: #449d44; }
 
-.tag-info, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release {
+.tag-info {
   background-color: #5bc0de; }
-  .tag-info[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release[href]:hover, .tag-info[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release[href]:focus {
+  .tag-info[href]:hover, .tag-info[href]:focus {
     background-color: #31b0d5; }
 
-.tag-warning, #page-admin-index .updateplugin .updatepluginconfirmexternal, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release,
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release {
+.tag-warning {
   background-color: #ff7518; }
-  .tag-warning[href]:hover, #page-admin-index .updateplugin .updatepluginconfirmexternal[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release[href]:hover,
-  #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release[href]:hover, .tag-warning[href]:focus, #page-admin-index .updateplugin .updatepluginconfirmexternal[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release[href]:focus,
-  #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release[href]:focus {
+  .tag-warning[href]:hover, .tag-warning[href]:focus {
     background-color: #e45c00; }
 
-.tag-danger, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release {
+.tag-danger {
   background-color: #d9534f; }
-  .tag-danger[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release[href]:hover, .tag-danger[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release[href]:focus {
+  .tag-danger[href]:hover, .tag-danger[href]:focus {
     background-color: #c9302c; }
 
 .custom-select {
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index 5e1ed7dc417..15d12e41405 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -9728,22 +9728,19 @@ a.dimmed_text:visited,
   .tag-success[href]:hover, .tag-success[href]:focus {
     background-color: #449d44; }
 
-.tag-info, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release {
+.tag-info {
   background-color: #5bc0de; }
-  .tag-info[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release[href]:hover, .tag-info[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity200 .info.release[href]:focus {
+  .tag-info[href]:hover, .tag-info[href]:focus {
     background-color: #31b0d5; }
 
-.tag-warning, #page-admin-index .updateplugin .updatepluginconfirmexternal, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release,
-#page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release {
+.tag-warning {
   background-color: #ff7518; }
-  .tag-warning[href]:hover, #page-admin-index .updateplugin .updatepluginconfirmexternal[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release[href]:hover,
-  #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release[href]:hover, .tag-warning[href]:focus, #page-admin-index .updateplugin .updatepluginconfirmexternal[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity100 .info.release[href]:focus,
-  #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity150 .info.release[href]:focus {
+  .tag-warning[href]:hover, .tag-warning[href]:focus {
     background-color: #e45c00; }
 
-.tag-danger, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release {
+.tag-danger {
   background-color: #d9534f; }
-  .tag-danger[href]:hover, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release[href]:hover, .tag-danger[href]:focus, #page-admin-index .adminwarning.availableupdatesinfo .moodleupdateinfo.maturity50 .info.release[href]:focus {
+  .tag-danger[href]:hover, .tag-danger[href]:focus {
     background-color: #c9302c; }
 
 .custom-select {