Drop webshim polyfill (#718)

Vast majority of browsers nowadays support HTML5, so there is no need
for webshimming. The library has not had an update in 7 years too.

Author: tadast

COPYRIGHT.txt

@@ -3,7 +3,7 @@ SequenceServer is copyright Anurag Priyam, Ben J Woodcroft and Yannick Wurm,
 version 3, the text of which can be found in LICENSE.txt.
 
 Components of SequenceServer, including Sinatra, Ox, Slop, html5shiv,
-Underscore, jQuery, jQuery UI, Bootstrap and Webshim, are licensed under
+Underscore, jQuery, jQuery UI and Bootstrap, are licensed under
 the MIT license. D3.js is licensed under BSD license. biojs-vis-sequence
 is licensed under Apache license. Thin and JSON are licensed under Ruby
 license. All unmodified files from these and other sources retain their

jest_scripts/jest-setup.js

@@ -1,5 +1,4 @@
 import $ from 'jquery';
-import 'webshim/js-webshim/minified/polyfiller';
 import '@testing-library/jest-dom';
 
 global.$ = global.jQuery = $;

package.json

@@ -33,8 +33,7 @@
     "react": "18",
     "react-app-polyfill": "^3.0.0",
     "react-dom": "18",
-    "underscore": "^1.8.3",
-    "webshim": "^1.15.8"
+    "underscore": "^1.8.3"
   },
   "devDependencies": {
     "@babel/core": "^7.17.9",

public/config.js

@@ -29,7 +29,6 @@ System.config({
     "react-dom": "npm:react-dom@18.0.0",
     "underscore": "npm:underscore@1.8.3",
     "vakata/jstree": "github:vakata/jstree@3.3.8",
-    "webshim": "npm:webshim@1.15.8",
     "github:components/jqueryui@1.11.4": {
       "jquery": "github:components/jquery@2.1.4"
     },
@@ -143,11 +142,6 @@ System.config({
     },
     "npm:vm-browserify@0.0.4": {
       "indexof": "npm:indexof@0.0.1"
-    },
-    "npm:webshim@1.15.8": {
-      "fs": "github:jspm/nodelibs-fs@0.1.2",
-      "path": "github:jspm/nodelibs-path@0.1.0",
-      "process": "github:jspm/nodelibs-process@0.1.2"
     }
   }
 });

public/js/jquery_world.js

@@ -1,7 +1,6 @@
 import $ from 'jquery';
 import '../packages/jquery-ui@1.11.4';
 import 'bootstrap';
-import 'webshim';
 
 global.$ = $;
 /**

public/js/search.js

@@ -3,14 +3,6 @@ import React, { Component } from "react";
 import { createRoot } from "react-dom/client";
 import { DnD } from "./dnd";
 import { Form } from "./form";
-/**
- * Load necessary polyfills.
- */
-$.webshims.setOptions(
-  "basePath",
-  "/vendor/npm/webshim@1.15.8/js-webshim/minified/shims/"
-);
-$.webshims.polyfill("forms");
 
 /**
  * Clear sessionStorage on reload.