Revert "FIX: JNI-135' - the option of using finalize() has been discarded

This reverts commit 20c32ff756, reversing
changes made to 59d6177dc8.

src/codegen/gen_java_Message.ysl2

@@ -68,11 +68,6 @@ tstylesheet {
                     release(handle);
                 }
 
-                @Override
-                public void finalize() {
-                    release(handle);
-                }
-
                 final protected long getHandle() {
                     return handle;
                 }