<?php
/*
 * Plugin Name: EPFL disable all automatic updates.
 * Plugin URI: 
 * Description: Must-use plugin for the EPFL website.
 * Version: 0.0.1
 * Author: wwp-admin@epfl.ch
 * */

/* Disable all automatic updates.
 *
 * http://codex.wordpress.org/Configuring_Automatic_Background_Updates
 */

// disable WordPress Core minor updates
add_filter( 'allow_minor_auto_core_updates', '__return_false' );

// disable WordPress Core major updates
add_filter( 'allow_major_auto_core_updates', '__return_false' );

// disable plugins updates
add_filter( 'auto_update_plugin', '__return_false' );

// disable themes updates
add_filter( 'auto_update_theme', '__return_false' );

// disable transalations updates
add_filter( 'auto_update_translation', '__return_false' );

// disable plugin update cues
add_filter('user_has_cap', 'epfl_cannot_update_plugins', 10, 3);

function epfl_cannot_update_plugins ($allcaps, $caps, $args) {
    unset($allcaps['update_plugins']);
    return $allcaps;
}

?>

<?php
/*
 * Plugin Name: EPFL disable all automatic updates.
 * Plugin URI: 
 * Description: Must-use plugin for the EPFL website.
 * Version: 0.0.1
 * Author: wwp-admin@epfl.ch
 * */

/* Disable all automatic updates.
 *
 * http://codex.wordpress.org/Configuring_Automatic_Background_Updates
 */

// disable WordPress Core minor updates
add_filter( 'allow_minor_auto_core_updates', '__return_false' );

// disable WordPress Core major updates
add_filter( 'allow_major_auto_core_updates', '__return_false' );

// disable plugins updates
add_filter( 'auto_update_plugin', '__return_false' );

// disable themes updates
add_filter( 'auto_update_theme', '__return_false' );

// disable transalations updates
add_filter( 'auto_update_translation', '__return_false' );

?>

--- 
+++ 
@@ -27,4 +27,12 @@
 // disable transalations updates
 add_filter( 'auto_update_translation', '__return_false' );
 
+// disable plugin update cues
+add_filter('user_has_cap', 'epfl_cannot_update_plugins', 10, 3);
+
+function epfl_cannot_update_plugins ($allcaps, $caps, $args) {
+    unset($allcaps['update_plugins']);
+    return $allcaps;
+}
+
 ?>
Remove all plugin update notices

Pretend nobody has permission to perform updates (which is kind of the truth)
