Merge pull request #4045 from esistgut/patch-2

ra-realtime no longer exists

Author: fzaninotto

docs/Ecosystem.md

@@ -42,7 +42,6 @@ See the [Data Provider](./DataProviders.md#available-providers) page.
 
 ## Miscellaneous
 
-- [marmelab/ra-realtime](https://github.com/marmelab/react-admin/tree/master/packages/ra-realtime): enable realtime updates
 - [marmelab/ra-tree-ui-materialui](https://github.com/marmelab/react-admin/blob/master/packages/ra-tree-ui-materialui/): Components to show data represented as a tree. Only compatible with react-admin v2 for now. 
 - [marmelab/ra-tree-core](https://github.com/marmelab/react-admin/blob/master/packages/ra-tree-core/): Components providing the logic but no UI to show data represented as a tree. Only compatible with react-admin v2 for now.
 - [ra-customizable-datagrid](https://github.com/fizix-io/ra-customizable-datagrid): plugin that allows to hide / show columns dynamically.