[dependency] Remove unnecessary dependency (#703)

Remove unnecessary dependency

Author: Routhleck

docs/index.rst

@@ -20,13 +20,7 @@ Installation
           # python 3.9-3.11
           pip install -U brainpy[cpu]  # windows, linux, macos
 
-    .. tab-item:: GPU (CUDA 11.0)
-
-       .. code-block:: bash
-
-          pip install -U brainpy[cuda11] -f https://storage.googleapis.com/jax-releases/jax_cuda_releases.html
-
-    .. tab-item:: GPU (CUDA 12.0)
+    .. tab-item:: GPU (CUDA 12)
 
        .. code-block:: bash
 

setup.py

@@ -68,12 +68,10 @@
     'https://storage.googleapis.com/jax-releases/jax_cuda_releases.html',
   ],
   extras_require={
-    'cpu': ['jaxlib>=0.4.13', 'brainpylib', 'numba', 'braintaichi'],
-    'cuda11': ['jaxlib[cuda11_pip]', 'brainpylib', 'numba', 'braintaichi'],
-    'cuda12': ['jaxlib[cuda12_pip]', 'brainpylib', 'numba', 'braintaichi'],
+    'cpu': ['jaxlib>=0.4.13', 'numba', 'braintaichi'],
+    'cuda12': ['jaxlib[cuda12_pip]', 'numba', 'braintaichi'],
     'tpu': ['jaxlib[tpu]', 'numba',],
     'cpu_mini': ['jaxlib>=0.4.13'],
-    'cuda11_mini': ['jaxlib[cuda11_pip]'],
     'cuda12_mini': ['jaxlib[cuda12_pip]'],
   },
   keywords=('computational neuroscience, '