Remove unused field.

src/core/org/luaj/vm2/LoadState.java

@@ -155,7 +155,6 @@ public class LoadState {
 	private static final LuaValue[]     NOVALUES    = {};
 	private static final Prototype[] NOPROTOS    = {};
 	private static final LocVars[]   NOLOCVARS   = {};
-	private static final LuaString[]  NOSTRVALUES = {};
 	private static final Upvaldesc[]  NOUPVALDESCS = {};
 	private static final int[]       NOINTS      = {};