diff --git a/admin/tool/bloglevelupgrade/db/install.php b/admin/tool/bloglevelupgrade/db/install.php
index 758e09dfea1..cdff384e77d 100644
--- a/admin/tool/bloglevelupgrade/db/install.php
+++ b/admin/tool/bloglevelupgrade/db/install.php
@@ -28,37 +28,6 @@ defined('MOODLE_INTERNAL') || die;
 function xmldb_tool_bloglevelupgrade_install() {
     global $CFG, $OUTPUT;
 
-    // this is a hack - admins were long ago instructed to upgrade blog levels,
-    // the problem is that blog is not supposed to be course level activity!!
-
-    if (!empty($CFG->bloglevel_upgrade_complete)) {
-        // somebody already upgrades, we do not need this any more
-        unset_config('bloglevel_upgrade_complete');
-        return;
-    }
-
-    if (!isset($CFG->bloglevel)) {
-        // fresh install?
-        return;
-    }
-
-    if (($CFG->bloglevel == BLOG_COURSE_LEVEL || $CFG->bloglevel == BLOG_GROUP_LEVEL)) {
-        // inform admins that some settings require attention after upgrade
-        $site = get_site();
-
-        $a = new StdClass;
-        $a->sitename = $site->fullname;
-        $a->fixurl   = "$CFG->wwwroot/$CFG->admin/tool/bloglevelupgrade/index.php";
-
-        $subject = get_string('bloglevelupgrade', 'tool_bloglevelupgrade');
-        $description = get_string('bloglevelupgradedescription', 'tool_bloglevelupgrade', $a);
-
-        // can not use messaging here because it is not configured yet!
-        upgrade_log(UPGRADE_LOG_NOTICE, null, $subject, $description);
-        set_config('tool_bloglevelupgrade_pending', 1);
-
-        echo $OUTPUT->notification($description);
-    }
 }
 
 
diff --git a/admin/tool/customlang/db/install.php b/admin/tool/customlang/db/install.php
index 01850115ef0..157e1898a08 100644
--- a/admin/tool/customlang/db/install.php
+++ b/admin/tool/customlang/db/install.php
@@ -28,24 +28,6 @@ defined('MOODLE_INTERNAL') || die;
 function xmldb_tool_customlang_install() {
     global $CFG, $OUTPUT, $DB;
 
-    // this is a hack - this plugin used to live in admin/report/customlang,
-    // we want to remove the orphaned version info and capability
-    // unless there is a new report type with the same name
-    // the original tables can be dropped because they are used for caching only
-
-    if (!file_exists("$CFG->dirroot/report/customlang")) {
-        unset_all_config_for_plugin('report_customlang');
-        capabilities_cleanup('report_customlang');
-        $dbman = $DB->get_manager();
-        $table = new xmldb_table('report_customlang');
-        if ($dbman->table_exists($table)) {
-            $dbman->drop_table($table);
-        }
-        $table = new xmldb_table('report_customlang_components');
-        if ($dbman->table_exists($table)) {
-            $dbman->drop_table($table);
-        }
-    }
 }
 
 
diff --git a/admin/tool/customlang/db/upgrade.php b/admin/tool/customlang/db/upgrade.php
index 72792f4811f..efe645e729a 100644
--- a/admin/tool/customlang/db/upgrade.php
+++ b/admin/tool/customlang/db/upgrade.php
@@ -29,8 +29,6 @@ function xmldb_tool_customlang_upgrade($oldversion) {
 
     $dbman = $DB->get_manager();
 
-    // Moodle v2.2.0 release upgrade line
-    // Put any upgrade step following this
 
     return true;
 }
diff --git a/admin/tool/qeupgradehelper/db/install.php b/admin/tool/qeupgradehelper/db/install.php
index c77ba2c69ce..7e26253742e 100644
--- a/admin/tool/qeupgradehelper/db/install.php
+++ b/admin/tool/qeupgradehelper/db/install.php
@@ -28,11 +28,4 @@ defined('MOODLE_INTERNAL') || die;
 function xmldb_tool_qeupgradehelper_install() {
     global $CFG;
 
-    // this is a hack - this plugin used to live in local/qeupgradehelper,
-    // we want to remove the orphaned version info and capability
-    // unless there is a local plugin type with the same name
-
-    if (!file_exists("$CFG->dirroot/local/qeupgradehelper")) {
-        unset_all_config_for_plugin('local_qeupgradehelper');
-    }
 }
diff --git a/admin/tool/unittest/db/install.php b/admin/tool/unittest/db/install.php
index 686683acdce..1923960d282 100644
--- a/admin/tool/unittest/db/install.php
+++ b/admin/tool/unittest/db/install.php
@@ -28,12 +28,4 @@ defined('MOODLE_INTERNAL') || die;
 function xmldb_tool_unittest_install() {
     global $CFG;
 
-    // this is a hack - this plugin used to live in admin/report/unittest,
-    // we want to remove the orphaned version info and capability
-    // unless there is a new report type with the same name
-
-    if (!file_exists("$CFG->dirroot/report/unittest")) {
-        unset_all_config_for_plugin('report_unittest');
-        capabilities_cleanup('report_unittest');
-    }
 }
diff --git a/admin/tool/unsuproles/db/install.php b/admin/tool/unsuproles/db/install.php
index 7e904f8f178..37b6fde0426 100644
--- a/admin/tool/unsuproles/db/install.php
+++ b/admin/tool/unsuproles/db/install.php
@@ -28,11 +28,4 @@ defined('MOODLE_INTERNAL') || die;
 function xmldb_tool_unsuproles_install() {
     global $CFG;
 
-    // this is a hack - this plugin used to live in admin/report/unsuproles,
-    // we want to remove the orphaned version info unless there is a new
-    // report type with the same name
-
-    if (!file_exists("$CFG->dirroot/report/report_unsuproles")) {
-        unset_all_config_for_plugin('report_unsuproles');
-    }
 }