js: Drop sparkline lib and behavior

library/Icinga/Web/JavaScript.php

@@ -27,7 +27,6 @@ class JavaScript
         'js/icinga/behavior/autofocus.js',
         'js/icinga/behavior/collapsible.js',
         'js/icinga/behavior/detach.js',
-        'js/icinga/behavior/sparkline.js',
         'js/icinga/behavior/dropdown.js',
         'js/icinga/behavior/navigation.js',
         'js/icinga/behavior/form.js',
@@ -41,8 +40,7 @@ class JavaScript
 
     protected static $vendorFiles = array(
         'js/vendor/jquery-3.4.1',
-        'js/vendor/jquery-migrate-3.1.0',
-        'js/vendor/jquery.sparkline'
+        'js/vendor/jquery-migrate-3.1.0'
     );
 
     public static function sendMinified()

public/js/icinga/behavior/sparkline.js

@@ -1,27 +0,0 @@
-/*! Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
-
-(function(Icinga, $) {
-
-    'use strict';
-
-    Icinga.Behaviors = Icinga.Behaviors || {};
-
-    var Sparkline = function (icinga) {
-        Icinga.EventListener.call(this, icinga);
-        this.on('rendered', this.onRendered, this);
-    };
-
-    Sparkline.prototype = new Icinga.EventListener();
-
-    Sparkline.prototype.onRendered = function(e) {
-        $(e.target).find('.sparkline').each(function() {
-            $(this).sparkline('html', {
-                enableTagOptions: true,
-                disableTooltips: true
-            });
-        });
-    };
-
-    Icinga.Behaviors.Sparkline = Sparkline;
-
-})(Icinga, jQuery);