Remove 3.9 and 3.8 from version selector (#773)

Author: Simran-B

site/themes/arangodb-docs-theme/layouts/partials/version-selector.html

@@ -4,7 +4,5 @@
  {{ range $i, $version := $versions }}
  <option value="{{ $version.name }}">{{ $version.name }}</option>
  {{ end }}
- <option value="3.9">3.9</option>
- <option value="3.8">3.8</option>
  </select>
 </div>

site/themes/arangodb-docs-theme/static/js/theme.js

@@ -414,25 +414,12 @@ function setVersionSelector(version) {
  }
 }
 
-function handleOldDocsVersion(version) {
- var legacyUrl = "https://www.arangodb.com/docs/" + version + "/";
- var handle = window.open(legacyUrl, "_blank");
- if (!handle) window.location.href = legacyUrl;
- return;
-}
-
 function getCurrentVersion() {
  var urlVersion = stableVersion.name
 
  if (window.location.pathname.split("/").length > 0) {
  newVersion = getVersionFromURL()
 
- if (newVersion === "3.8" || newVersion === "3.9") {
- handleOldDocsVersion(newVersion)
- versionSelector.value = urlVersion;
- return;
- }
-
  if (getVersionInfo(newVersion) == undefined) {
  loadNotFoundPage();
  return;
@@ -451,12 +438,6 @@ function changeVersion() {
  var versionSelector = document.getElementById("arangodb-version");
  var newVersion = versionSelector.options[versionSelector.selectedIndex].value;
 
- if (newVersion === "3.8" || newVersion === "3.9") {
- handleOldDocsVersion(newVersion)
- versionSelector.value = oldVersion;
- return;
- }
-
  try {
  localStorage.setItem('docs-version', newVersion);
  renderVersion();