removed unused configuration now that no parent pom to override

Author: hboutemy

pom.xml

@@ -363,10 +363,6 @@ limitations under the License.
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
           <version>3.5.1</version>
-          <configuration>
-            <source>${maven.compiler.source}</source>
-            <target>${maven.compiler.target}</target>
-          </configuration>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>