Remove konamiCode directive since it isn't used anywhere in core (#7437)

src/Umbraco.Web.UI.Client/src/common/directives/util/konami.directive.js

@@ -1,62 +0,0 @@
-/**
- * Konami Code directive for AngularJS
- * @version v0.0.1
- * @license MIT License, https://www.opensource.org/licenses/MIT
- */
-
-angular.module('umbraco.directives')
-  .directive('konamiCode', ['$document', function ($document) {
-      var konamiKeysDefault = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65];
-
-      return {
-          restrict: 'A',
-          link: function (scope, element, attr) {
-
-              if (!attr.konamiCode) {
-                  throw ('Konami directive must receive an expression as value.');
-              }
-
-              // Let user define a custom code.
-              var konamiKeys = attr.konamiKeys || konamiKeysDefault;
-              var keyIndex = 0;
-
-              /**
-               * Fired when konami code is type.
-               */
-              function activated() {
-                  if ('konamiOnce' in attr) {
-                      stopListening();
-                  }
-                  // Execute expression.
-                  scope.$eval(attr.konamiCode);
-              }
-
-              /**
-               * Handle keydown events.
-               */
-              function keydown(e) {
-                  if (e.keyCode === konamiKeys[keyIndex++]) {
-                      if (keyIndex === konamiKeys.length) {
-                          keyIndex = 0;
-                          activated();
-                      }
-                  } else {
-                      keyIndex = 0;
-                  }
-              }
-
-              /**
-               * Stop to listen typing.
-               */
-              function stopListening() {
-                  $document.off('keydown', keydown);
-              }
-
-              // Start listening to key typing.
-              $document.on('keydown', keydown);
-
-              // Stop listening when scope is destroyed.
-              scope.$on('$destroy', stopListening);
-          }
-      };
-  }]);