update readme

Author: chaoming0625

README.md

@@ -22,21 +22,6 @@ BrainPy is a flexible, efficient, and extensible framework for computational neu
 - **Source on OpenI**: https://git.openi.org.cn/OpenI/BrainPy
 
 
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-**NOTE**
-
-Starting from our experimental BrainPy package, a better and mature ecosystem for brain dynamics programming is emerging.
-Please see the [Brain Dynamics Programming Ecosystem](https://ecosystem-for-brain-dynamics.readthedocs.io/) for more details.
-
-
-If you are heavily using BrainPy, please consider using [brainstate](https://brainstate.readthedocs.io) for a more stable, efficient, concise, and powerful experience.
-
-
-[brainstate](https://github.com/chaobrain/brainstate) is and will be active maintained and developed by our team. We highly recommend transferring your code to [brainstate](https://brainstate.readthedocs.io) for a better performance.
-
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-
-
 
 ## Installation
 
@@ -70,7 +55,6 @@ We provide a Binder environment for BrainPy. You can use the following button to
 ## Ecosystem
 
 
-- **[Brain Dynamics Programming Ecosystem](https://ecosystem-for-brain-dynamics.readthedocs.io/)**: An emerging and mature ecosystem for brain dynamics programming.
 - **[BrainPy](https://github.com/brainpy/BrainPy)**: The solution for the general-purpose brain dynamics programming. 
 - **[brainpy-examples](https://github.com/brainpy/examples)**: Comprehensive examples of BrainPy computation. 
 - **[brainpy-datasets](https://github.com/brainpy/datasets)**: Neuromorphic and Cognitive Datasets for Brain Dynamics Modeling.

docs/index.rst

@@ -104,15 +104,6 @@ Learn more
    APIs may be changed over time. Please always keeps
    in mind what BrainPy version you are using.
 
-.. note::
-   Starting from our experimental BrainPy package, a better and mature ecosystem for brain dynamics programming is emerging.
-   Please see the `Brain Dynamics Programming Ecosystem <https://ecosystem-for-brain-dynamics.readthedocs.io/>`_ for more details.
-
-   If you are heavily using BrainPy, please consider using `brainstate <https://brainstate.readthedocs.io>`_ for a more stable, efficient, concise, and powerful experience.
-
-   `brainstate <https://github.com/chaobrain/brainstate>`_ is and will be active maintained and developed by our team.
-   We highly recommend transferring your code to brainstate for a better performance.
-
 
 
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