Remove junit-platform-runner (dropped in JUnit 6)

junit-platform-runner provided JUnit 4 compatibility which was removed
in JUnit 6. Remove the dependency and its version property from pom.xml.

Author: kwent

pom.xml

@@ -330,12 +330,6 @@
             <version>${junit-version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.platform</groupId>
-            <artifactId>junit-platform-runner</artifactId>
-            <version>${junit-platform-runner.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
     <properties>
         <java.version>17</java.version>
@@ -349,8 +343,7 @@
         <jakarta-annotation-version>3.0.0</jakarta-annotation-version>
         <beanvalidation-version>2.0.2</beanvalidation-version>
         <junit-version>6.1.1</junit-version>
-        <junit-platform-runner.version>6.1.1</junit-platform-runner.version>
-        <jakarta.ws.rs-api-version>4.0.0</jakarta.ws.rs-api-version>
+<jakarta.ws.rs-api-version>4.0.0</jakarta.ws.rs-api-version>
         <jsr311-api-version>1.1.1</jsr311-api-version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <spotless.version>2.46.1</spotless.version>