How can I remove maven dependency jar in Eclipse

I'm really new to Maven and just converted my app-engine project to a Maven project. I've added dependencies in the pom.xml file in order to get rid of the errors. but now I get in my code

The method getPart(String) is undefined for the type HttpServletRequest

So after doing a bit of research on Stack Overflow it appears I need to have a single and updated package of servlet-api to make that work properly.

Apparently I may have a conflict with an older version that is in my Maven dependencies but I never added it in the pom.xml and now I'm stuck with this jar not knowing why it is imported and how I can delete it.

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-project</groupId>
  <artifactId>my-project</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.1</version>
            <configuration>
                 <webResources>
                    <resource>
                        <directory>${basedir}/src/main/webapp/WEB-INF</directory>
                        <filtering>true</filtering>
                        <targetPath>WEB-INF</targetPath>
                    </resource>
                </webResources>
            </configuration>
      </plugin>
      <plugin>
        <groupId>com.google.cloud.tools</groupId>
        <artifactId>appengine-maven-plugin</artifactId>
         <version>1.3.1</version>
            <configuration>
                 <deploy.promote>true</deploy.promote>
                <deploy.stopPreviousVersion>true</deploy.stopPreviousVersion>
            </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>com.mailjet</groupId>
        <artifactId>mailjet-client</artifactId>
        <version>4.2.1</version>
    </dependency>
    <dependency>
        <groupId>com.google.appengine.tools</groupId>
        <artifactId>appengine-gcs-client</artifactId>
        <version>0.8</version>
    </dependency>
  </dependencies>
  <properties>
  <maven.compiler.source>1.8</maven.compiler.source>
  <maven.compiler.target>1.8</maven.compiler.target>
</properties>
</project>

and here are images of what I get in Maven dependencies in my build path.

my guess is that the error comes from having a 2.5 version of the servlet-api.

So any help is greatly appreciated, I saw something about the exclusion tag but don't even know where to put it as it doesn't look like anything in the pom.xml is asking for this jar.