Revert "fix react batching workaround"

This reverts commit c0ea6a6.

packages/slate-react/src/plugin/with-react.ts

@@ -349,13 +349,25 @@ export const withReact = <T extends BaseEditor>(
   }
 
   e.onChange = options => {
-    const onContextChange = EDITOR_TO_ON_CHANGE.get(e)
-
-    if (onContextChange) {
-      onContextChange(options)
-    }
+    // COMPAT: React < 18 doesn't batch `setState` hook calls, which means
+    // that the children and selection can get out of sync for one render
+    // pass. So we have to use this unstable API to ensure it batches them.
+    // (2019/12/03)
+    // https://github.com/facebook/react/issues/14259#issuecomment-439702367
+    const maybeBatchUpdates =
+      REACT_MAJOR_VERSION < 18
+        ? ReactDOM.unstable_batchedUpdates
+        : (callback: () => void) => callback()
+
+    maybeBatchUpdates(() => {
+      const onContextChange = EDITOR_TO_ON_CHANGE.get(e)
+
+      if (onContextChange) {
+        onContextChange(options)
+      }
 
-    onChange(options)
+      onChange(options)
+    })
   }
 
   return e