Remove shaded JUnit platform

It is present as dependency anyway and even if not it makes no sense to depend on
this module without platform being present already anywy and shading it without relocation easily leads to conflicts.

Author: Vampire

pom.xml

@@ -248,25 +248,6 @@
 					</execution>
 				</executions>
 			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-shade-plugin</artifactId>
-				<version>3.2.1</version>
-				<executions>
-					<execution>
-						<goals>
-							<goal>shade</goal>
-						</goals>
-					</execution>
-				</executions>
-				<configuration>
-					<artifactSet>
-						<includes>
-							<include>org.junit.platform:*</include>
-						</includes>
-					</artifactSet>
-				</configuration>
-			</plugin>
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>flatten-maven-plugin</artifactId>