"target" subdirectories in package explorer in recent eclipse (at least 4.13 + maven 3.6.x) - eclipse

Question

So in Eclipse 4.13 (and maybe a few versions before) with embedded maven 3.6.x, when I open a simple, almost empty, maven project, it shows me these non existant subdirectories in project explorer :
target/generated-sources/annotations
target/generated-sources/test-annotations
If I remove them from source directories (in project > properties > java build path), eclipse creates these directories and add them as sources again, so I guess it comes from some maven plugin conf somewhere.
How do I get rid of these 2 directories display when I don't have use of them ?
And since this problem probably comes from a combination of maven 3.6 + Eclipse 4.13 + some maven dependency, here is my pom.xml :
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my.comp</groupId>
<artifactId>file-mgt-backend</artifactId>
<version>${revision}</version>
<name>My project</name>
<properties>
<java.version>1.8</java.version>
<springfox.version>2.9.2</springfox.version>
<!-- Downgrade to 3.1.1 needed for Eclipse bug : https://bugs.eclipse.org/bugs/show_bug.cgi?id=547340 -->
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
<!-- Sane default when no revision property is passed in from the commandline -->
<revision>0-SNAPSHOT</revision>
</properties>
<scm>
<developerConnection>(...)</developerConnection>
</scm>
<!-- Paramètres de publication de l'artifact -->
<distributionManagement>
<repository>
(...)
</repository>
</distributionManagement>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${springfox.version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox.version}</version>
</dependency>
<dependency>
<groupId>commons-validator</groupId>
<artifactId>commons-validator</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-scm-plugin</artifactId>
<version>1.11.2</version>
</plugin>
</plugins>
</build>
</project>