I have installed yii2-admin module, located in /vendor/mdmsoft/yii2-admin but I don't want it to load its own asset bundle. It there any way to disable this module asset bundle?
Yes, it's possible and even mentioned in official docs here. One way to do it is through application config:
return [
// ...
'components' => [
'assetManager' => [
'bundles' => [
'mdm\admin\AdminAsset' => false,
],
],
],
];
Another way - during runtime through component:
\Yii::$app->assetManager->bundles['mdm\admin\AdminAsset'] = false;