Cleanup xml files and old javahelp

Core/nbproject/project.properties

...c/org/sleuthkit/autopsy/casemodule/casemodule-helpset.xml

Core/src/org/sleuthkit/autopsy/casemodule/layer.xml.old

Core/src/org/sleuthkit/autopsy/core/layer - case.xml

Core/src/org/sleuthkit/autopsy/core/layer-empty.xml

...g/sleuthkit/autopsy/corecomponentinterfaces/layer-old.xml

...euthkit/autopsy/corecomponents/corecomponents-helpset.xml

Core/src/org/sleuthkit/autopsy/corecomponents/layer-old.xml

Core/src/org/sleuthkit/autopsy/coreutils/layer-old.xml

...sleuthkit/autopsy/directorytree/directorytree-helpset.xml

Core/src/org/sleuthkit/autopsy/directorytree/layer-old.xml

Core/src/org/sleuthkit/autopsy/filesearch/layer-old.xml

Core/src/org/sleuthkit/autopsy/ingest/layer-old.xml

Core/src/org/sleuthkit/autopsy/menuactions/layer-old.xml

Core/src/org/sleuthkit/autopsy/report/layer-old.xml