关于spring-boot-thin-launcher打出的jar包里仍然含有许多jar的问题

想把springboot打出的jar包瘦身下，找了下https://github.com/spring-projects-experimental/spring-boot-thin-launcher

然后我加配置

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>learn.springboot</groupId>
    <artifactId>thin-pack-demo</artifactId>
    <version>1.0.0</version>
    <name>thin-pack-demo</name>
    <description>demo to show how to pack thin jar and run</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework.boot.experimental</groupId>
                        <artifactId>spring-boot-thin-layout</artifactId>
                        <version>1.0.21.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>

mvn package 后为啥打出的app.jar里还是有很多的jar 包，如下图

我删除这些jar包后，执行
java -jar app.jar --thin.root c:\me.m2 可以运行。

什么地方配置可以去除这些jar包呢