docs: clean locales directory

docs/locales/.gitignore

@@ -0,0 +1,4 @@
+*
+!.gitignore
+!*/LC_MESSAGES/**/*.po
+!gettext/**/*.pot

docs/locales/gettext/_sphinx_design_static/design-tabs.js

@@ -1,27 +0,0 @@
-var sd_labels_by_text = {};
-
-function ready() {
-  const li = document.getElementsByClassName("sd-tab-label");
-  for (const label of li) {
-    syncId = label.getAttribute("data-sync-id");
-    if (syncId) {
-      label.onclick = onLabelClick;
-      if (!sd_labels_by_text[syncId]) {
-        sd_labels_by_text[syncId] = [];
-      }
-      sd_labels_by_text[syncId].push(label);
-    }
-  }
-}
-
-function onLabelClick() {
-  // Activate other inputs with the same sync id.
-  syncId = this.getAttribute("data-sync-id");
-  for (label of sd_labels_by_text[syncId]) {
-    if (label === this) continue;
-    label.previousElementSibling.checked = true;
-  }
-  window.localStorage.setItem("sphinx-design-last-tab", syncId);
-}
-
-document.addEventListener("DOMContentLoaded", ready, false);