Remove <source> and <target> compiler arguments

<release> is (should be?) enough - no need to use the “obsolete” source and target arguments.

Author: brenuart

pom.xml

@@ -248,8 +248,6 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
                     <release>${java.version}</release>
                 </configuration>
             </plugin>