Ability to delete from store

src/runtime-js.ts

@@ -160,6 +160,9 @@ export const _rt = {
 
         return { _tag: 'Rebind', _0: name, _1: rest, _2: value };
     },
+    deleteAt: (path: any[]) => {
+        return { _tag: 'DeleteAt', _0: path };
+    },
     "undefine!": (name: string) => {
         delete store[name];
         definitions.delete(name);