Remove source and target as maven.compiler.release is already set

See gh-34761

Author: arend-von-reinersdorff

spring-boot-project/spring-boot-starters/spring-boot-starter-parent/build.gradle

@@ -21,8 +21,6 @@ publishing.publications.withType(MavenPublication) {
 			properties {
 				delegate."java.version"('17')
 				delegate."resource.delimiter"('@')
-				delegate."maven.compiler.source"('${java.version}')
-				delegate."maven.compiler.target"('${java.version}')
 				delegate."maven.compiler.release"('${java.version}')
 				delegate."project.build.sourceEncoding"('UTF-8')
 				delegate."project.reporting.outputEncoding"('UTF-8')