Lang: Remove Norwegian Bokmal nb (#384)

As the translation level is below 80%

Author: microbit-mark

editor.html

@@ -352,10 +352,9 @@ <h2><i class="fa fa-cogs"></i> <strong>{{ title }}</strong></h2>
                                 <li><span title="Spanish"><a lang="es" href="#" class="action lang-choice" id="es" tabindex="127">Español</a></span></li>
                                 <li><span title="French"><a lang="fr" href="#" class="action lang-choice" id="fr" tabindex="128">Français</a></span></li>
                                 <li><span title="Korean"><a lang="ko" href="#" class="action lang-choice" id="ko" tabindex="129">한국어</a></span></li>
-                                <li><span title="Norwegian Bokmal"><a lang="nb" href="#" class="action lang-choice" id="nb" tabindex="130">Norsk Bokmal</a></span></li>
-                                <li><span title="Norwegian Nynorsk"><a lang="nn" href="#" class="action lang-choice" id="nn" tabindex="131">Norsk Nynorsk</a></span></li>
-                                <li><span title="Portuguese"><a lang="pt" href="#" class="action lang-choice" id="pt" tabindex="132">Português</a></span></li>
-                                <li><span title="Serbian"><a lang="sr" href="#" class="action lang-choice" id="sr" tabindex="133">Српски</a></span></li>
+                                <li><span title="Norwegian Nynorsk"><a lang="nn" href="#" class="action lang-choice" id="nn" tabindex="130">Norsk Nynorsk</a></span></li>
+                                <li><span title="Portuguese"><a lang="pt" href="#" class="action lang-choice" id="pt" tabindex="131">Português</a></span></li>
+                                <li><span title="Serbian"><a lang="sr" href="#" class="action lang-choice" id="sr" tabindex="132">Српски</a></span></li>
                             </ul>
                             <div><a id="add-language-link" class="action" title="Add a language translation to the Editor" href="https://support.microbit.org/support/solutions/articles/19000106022-translating-the-micro-bit-python-editor" target="_blank" tabindex="134">Add a language</a></div>
                         </div>

js/python-main.js

@@ -269,7 +269,7 @@ function translations(baseLanguage) {
     'use strict';
     // These values must be valid language codes
     // https://www.w3.org/TR/REC-html40/struct/dirlang.html#langcodes
-    var validLangs = ['en', 'es', 'fr', 'hr', 'ko', 'nb', 'nn', 'pl', 'pt', 'sr', 'zh-HK', 'zh-CN', 'zh-TW'];
+    var validLangs = ['en', 'es', 'fr', 'hr', 'ko', 'nn', 'pl', 'pt', 'sr', 'zh-HK', 'zh-CN', 'zh-TW'];
 
     // This is the base language that will be extended with the translations.
     // It is assumed this translation object (likely 'en') contains all the

lang/en.js

@@ -143,9 +143,6 @@ var LANGUAGE = {
     'ko': {
       'title': 'Korean'
     },
-    'nb': {
-      'title': 'Norwegian Bokmal'
-    },
     'nn': {
       'title': 'Norwegian Nynorsk'
     },