要配置文件main.php中查看
'assetManager' => [
'bundles' => [
'yiiwebJqueryAsset' => [
'js'=>[]
],
'yiibootstrapBootstrapPluginAsset' => [
'js'=>[]
],
'yiibootstrapBootstrapAsset' => [
'css' => [],
],
],
],
UPDATE
As Soju mentioned in comments, another alternative way would be disabling these files in AppAsset class, which is located in ./assets/, then remove the following lines:
public $depends = [
'yiiwebYiiAsset', #REMOVE
'yiibootstrapBootstrapAsset', #REMOVE
];