NPECheck cleanup: removing weird hypothetical states, and removing instanceof states.

Author: lahodaj

java/java.hints/nbproject/project.properties

@@ -17,7 +17,7 @@
 
 spec.version.base=1.116.0
 
-javac.release=17
+javac.release=21
 
 nbroot=../..
 jbrowse.external=${nbroot}/retouche