Delete explicit reference to WEB-INF/tile/tilesFtl.xml

It is not needed and is potentially confusing.

Because completeAutoload=true org.apache.tiles.extras.complete.CompleteAutoloadTilesContainerFactory.getSources is used and that method automatically finds any file whose name matches /WEB-INF/**/tiles*.xml
Demonstrate mixing FreeMarker and JSP in the same page
Fix IntelliJ warnings