GUACAMOLE-773: Remove angular-touch (no longer applicable).

Previously, the angular-touch library provided by AngularJS was used to
allow click interactions with UI components to work on touch devices
without an uncomfortable ~300ms delay. From AngularJS 1.7.x onward, this
feature of angular-touch is no longer present:

https://docs.angularjs.org/guide/migration#ngtouch

This should be OK - modern browsers will now recognize applications
aimed at touch support via the use of the "viewport" meta tag (which we
use), removing our original need for angular-touch. The same goes for
IE10+.

doc/licenses/angular-1.8.2/dep-coordinates.txt

@@ -1,3 +1,2 @@
 angular-route:1.8.2
-angular-touch:1.8.2
 angular:1.8.2

guacamole/src/main/frontend/package-lock.json

@@ -544,11 +544,6 @@
                 }
             }
         },
-        "angular-touch": {
-            "version": "1.8.2",
-            "resolved": "https://registry.npmjs.org/angular-touch/-/angular-touch-1.8.2.tgz",
-            "integrity": "sha512-tGoFNsONm/VHFcBW8gySVZvpCIYAvsAlEuHpJDugGn+3ENLxSDhpZ4ikev4KXfWr8ZNsYGoVSfsvJegkiC+9Ig=="
-        },
         "angular-translate": {
             "version": "2.18.4",
             "resolved": "https://registry.npmjs.org/angular-translate/-/angular-translate-2.18.4.tgz",

guacamole/src/main/frontend/package.json

@@ -8,7 +8,6 @@
         "angular": "1.8.2",
         "angular-route": "1.8.2",
         "angular-templatecache-webpack-plugin": "^1.0.1",
-        "angular-touch": "1.8.2",
         "angular-translate": "2.18.4",
         "angular-translate-interpolation-messageformat": "2.18.4",
         "angular-translate-loader-static-files": "2.18.4",

guacamole/src/main/frontend/src/app/index/indexModule.js

@@ -29,7 +29,6 @@ require('angular-translate-loader-static-files');
 angular.module('index', [
 
     require('angular-route'),
-    require('angular-touch'),
     require('angular-translate'),
 
     'auth',