Improve "language stats" UI (#26968)

Before:

* The layout is quite complex 
* The UI flickers when switch the stats (https://try.gitea.io/)

After:

* Simplify the code
* The UI doesn't flicker

web_src/js/features/repo-legacy.js

@@ -11,7 +11,6 @@ import {htmlEscape} from 'escape-goat';
 import {initRepoBranchTagSelector} from '../components/RepoBranchTagSelector.vue';
 import {
   initRepoCloneLink, initRepoCommonBranchOrTagDropdown, initRepoCommonFilterSearchDropdown,
-  initRepoCommonLanguageStats,
 } from './repo-common.js';
 import {initCitationFileCopyContent} from './citation.js';
 import {initCompLabelEdit} from './comp/LabelEdit.js';
@@ -525,7 +524,6 @@ export function initRepository() {
 
   initRepoCloneLink();
   initCitationFileCopyContent();
-  initRepoCommonLanguageStats();
   initRepoSettingBranches();
 
   // Issues