Let netbeans.compile.on.save revert to its default.

Seems to work in 8.0 at least for some functional tests.
Developers can always disable it privately if they run into issues.

pom.xml

@@ -95,7 +95,6 @@ THE SOFTWARE.
 
     <slf4jVersion>1.7.4</slf4jVersion> <!-- < 1.6.x version didn't specify the license (MIT) -->
     <maven-plugin.version>2.1</maven-plugin.version>
-    <netbeans.compile.on.save>none</netbeans.compile.on.save> <!-- we rely on Maven source generation -->
     <animal.sniffer.skip>${skipTests}</animal.sniffer.skip>
 
     <java.level>6</java.level>