return [
    // ...
    'components' => [
        'assetManager' => [
            'bundles' => [
                'yii\web\JqueryAsset' => [
                'sourcePath' => null,
                'basePath' => '@webroot',
                'baseUrl' => '@web',
                'js' => [
                        'jquery.min.js',
                    ]
                ],
            ],
        ],
    ],
];

return [
    // ...
    'components' => [
        'assetManager' => [
            'bundles' => [
                'yii\web\JqueryAsset' => [
                    'sourcePath' => null,
                    'js' => [
                        '//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js',
                    ]
                ],
            ],
        ],
    ],
];

return [
    // ...
    'components' => [
        'assetManager' => [
            'bundles' => [
                'yii\web\JqueryAsset' => [
                    'js'=>[] // disable JQuery
                ],
                'yii\bootstrap\BootstrapPluginAsset' => [
                    'js'=>[] // disable JS Bootstrap
                ],
                'yii\bootstrap\BootstrapAsset' => [
                    'css' => [], // disable Css Bootstrap
                ],
            ],
        ],
    ],
];

return [
    // ...
    'components' => [
        'assetManager' => [
            'bundles' => [
               'yii\web\JqueryAsset' => false,
               'yii\bootstrap\BootstrapPluginAsset' => false,
               'yii\bootstrap\BootstrapAsset' => false,
            ],
        ],
    ],
];