diff --git a/blocks/calendar_month/block_calendar_month.php b/blocks/calendar_month/block_calendar_month.php
index 41cd98e56b5..ace839e7b66 100644
--- a/blocks/calendar_month/block_calendar_month.php
+++ b/blocks/calendar_month/block_calendar_month.php
@@ -30,15 +30,6 @@ class block_calendar_month extends block_base {
         $this->title = get_string('pluginname', 'block_calendar_month');
     }
 
-    /**
-     * Return preferred_width.
-     *
-     * @return int
-     */
-    public function preferred_width() {
-        return 210;
-    }
-
     /**
      * Return the content of this block.
      *
diff --git a/blocks/course_summary/block_course_summary.php b/blocks/course_summary/block_course_summary.php
index 281aba3fad8..c2163fca054 100644
--- a/blocks/course_summary/block_course_summary.php
+++ b/blocks/course_summary/block_course_summary.php
@@ -74,10 +74,6 @@ class block_course_summary extends block_base {
         return true;
     }
 
-    function preferred_width() {
-        return 210;
-    }
-
 }
 
 
diff --git a/blocks/moodleblock.class.php b/blocks/moodleblock.class.php
index bbbd72b3d8d..0061a9bdd6c 100644
--- a/blocks/moodleblock.class.php
+++ b/blocks/moodleblock.class.php
@@ -326,11 +326,6 @@ class block_base {
             $correct = false;
         }
 
-        $width = $this->preferred_width();
-        if (!is_int($width) || $width <= 0) {
-            $errors[] = 'invalid_width';
-            $correct = false;
-        }
         return $correct;
     }
 
@@ -594,17 +589,6 @@ class block_base {
         return array('moodle/block:view', 'moodle/block:edit');
     }
 
-    // Methods deprecated in Moodle 2.0 ========================================
-
-    /**
-     * Default case: the block wants to be 180 pixels wide
-     * @deprecated since Moodle 2.0.
-     * @return int
-     */
-    function preferred_width() {
-        return 180;
-    }
-
     /**
      * Can be overridden by the block to prevent the block from being dockable.
      *
diff --git a/blocks/rss_client/block_rss_client.php b/blocks/rss_client/block_rss_client.php
index 27b771de4d1..2838651cd43 100644
--- a/blocks/rss_client/block_rss_client.php
+++ b/blocks/rss_client/block_rss_client.php
@@ -28,10 +28,6 @@
         $this->title = get_string('pluginname', 'block_rss_client');
     }
 
-    function preferred_width() {
-        return 210;
-    }
-
     function applicable_formats() {
         return array('all' => true, 'tag' => false);   // Needs work to make it work on tags MDL-11960
     }
diff --git a/blocks/tag_flickr/block_tag_flickr.php b/blocks/tag_flickr/block_tag_flickr.php
index 46f8c190c05..06f691d388d 100644
--- a/blocks/tag_flickr/block_tag_flickr.php
+++ b/blocks/tag_flickr/block_tag_flickr.php
@@ -43,10 +43,6 @@ class block_tag_flickr extends block_base {
         return true;
     }
 
-    function preferred_width() {
-        return 170;
-    }
-
     function get_content() {
         global $CFG, $USER;
 
diff --git a/blocks/tag_youtube/block_tag_youtube.php b/blocks/tag_youtube/block_tag_youtube.php
index 3779d42815c..a06588e5e98 100644
--- a/blocks/tag_youtube/block_tag_youtube.php
+++ b/blocks/tag_youtube/block_tag_youtube.php
@@ -45,10 +45,6 @@ class block_tag_youtube extends block_base {
         return true;
     }
 
-    function preferred_width() {
-        return 140;
-    }
-
     function get_content() {
         global $CFG;
 
diff --git a/blocks/upgrade.txt b/blocks/upgrade.txt
index abd99d2af9a..17e78fc07a7 100644
--- a/blocks/upgrade.txt
+++ b/blocks/upgrade.txt
@@ -1,6 +1,10 @@
 This files describes API changes in /blocks/* - activity modules,
 information provided here is intended especially for developers.
 
+=== 2.9 ===
+
+* The obsolete method preferred_width() was removed.
+
 === 2.8 ===
 
 * The instance_config_print() function was removed. It was deprecated in