diff --git a/main/inc/lib/database.constants.inc.php b/main/inc/lib/database.constants.inc.php
index 844eb79c9e..e9bbb88da5 100644
--- a/main/inc/lib/database.constants.inc.php
+++ b/main/inc/lib/database.constants.inc.php
@@ -135,20 +135,12 @@ define('TABLE_STATISTIC_TRACK_E_DEFAULT',           'track_e_default');
 define('TABLE_STATISTIC_TRACK_E_UPLOADS',           'track_e_uploads');
 define('TABLE_STATISTIC_TRACK_E_HOTSPOT',           'track_e_hotspot');
 define('TABLE_STATISTIC_TRACK_E_ITEM_PROPERTY',     'track_e_item_property');
-define('TABLE_STATISTIC_TRACK_E_OPEN',              'track_e_open');
-
 define('TABLE_STATISTIC_TRACK_FILTERED_TERMS',      'track_filtered_terms');
-define('TABLE_STATISTIC_TRACK_C_BROWSERS',          'track_c_browsers');
-define('TABLE_STATISTIC_TRACK_C_COUNTRIES',         'track_c_countries');
-define('TABLE_STATISTIC_TRACK_C_OS',                'track_c_os');
-define('TABLE_STATISTIC_TRACK_C_PROVIDERS',         'track_c_providers');
-define('TABLE_STATISTIC_TRACK_C_REFERERS',          'track_c_referers');
 
 //Course catalog stats see #4191
 define('TABLE_STATISTIC_TRACK_COURSE_RANKING',      'track_course_ranking');
 define('TABLE_MAIN_USER_REL_COURSE_VOTE',           'user_rel_course_vote');
 
-
 // SCORM database tables this is used only during the migration from 1.6 to 1.8 see update-db-scorm-1.6.x-1.8.0.inc
 define('TABLE_SCORM_MAIN', 'scorm_main');
 define('TABLE_SCORM_SCO_DATA', 'scorm_sco_data');
diff --git a/main/inc/lib/events.lib.inc.php b/main/inc/lib/events.lib.inc.php
index 81b4cc2b5c..ee964c8f80 100644
--- a/main/inc/lib/events.lib.inc.php
+++ b/main/inc/lib/events.lib.inc.php
@@ -12,46 +12,6 @@
  * @package chamilo.library
  */
 
-/**
- * @author Sebastien Piraux <piraux_seb@hotmail.com>
- * @desc Record information for open event (when homepage is opened)
- */
-function event_open()
-{
-    global $_configuration;
-    $TABLETRACK_OPEN = Database::get_main_table(TABLE_STATISTIC_TRACK_E_OPEN);
-
-    // @getHostByAddr($_SERVER['REMOTE_ADDR']) : will provide host and country information
-    // $_SERVER['HTTP_USER_AGENT'] :  will provide browser and os information
-    // $_SERVER['HTTP_REFERER'] : provide information about refering url
-    if (isset($_SERVER['HTTP_REFERER'])) {
-        $referer = Database::escape_string($_SERVER['HTTP_REFERER']);
-    } else {
-        $referer = '';
-    }
-    // record informations only if user comes from another site
-    //if(!eregi($_configuration['root_web'],$referer))
-    $pos = strpos($referer, $_configuration['root_web']);
-    if ($pos === false && $referer != '') {
-        $ip = api_get_real_ip();
-        $remhost = @ getHostByAddr($ip);
-        if ($remhost == $ip) {
-            $remhost = "Unknown"; // don't change this
-        }
-        $reallyNow = api_get_utc_datetime();
-        $sql = "INSERT INTO ".$TABLETRACK_OPEN."
-        		(open_remote_host,
-        		 open_agent,
-        		 open_referer,
-        		 open_date)
-        		VALUES
-        		('".$remhost."',
-        		 '".Database::escape_string($_SERVER['HTTP_USER_AGENT'])."', '".Database::escape_string($referer)."', '$reallyNow')";
-        Database::query($sql);
-    }
-    return 1;
-}
-
 /**
  * @author Sebastien Piraux <piraux_seb@hotmail.com> old code
  * @author Julio Montoya 2013