Revert "fix: externatlise vtk js"

This reverts commit 888a7f08b9da7f4081af7b441fcf71a65fd561f5.

Author: sridhar-mani

rollup.config.js

@@ -39,5 +39,5 @@ export default {
     }),
     terser(),
   ],
-  external: ["@kitware/vtk.js"],
+  external: [],
 };