Remove unused field

Author: gilles-duboscq

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/impl/ClassRegistry.java

@@ -123,7 +123,6 @@ private ClassDefinitionInfo(StaticObject protectionDomain,
         public final boolean isHidden;
         public final boolean isStrongHidden;
         public final boolean forceAllowVMAnnotations;
-        public long klassID = -1;
 
         public boolean addedToRegistry() {
             return !isAnonymousClass() && !isHidden();