How to uninstall Python Virtualenv from IPython Jupyter Notebook

1)
List all kernelspec
$ jupyter kernelspec list
Available kernels:
  myenv1     /home/user/.local/share/jupyter/kernels/myenv1
  myenv3     /home/user/.local/share/jupyter/kernels/myenv3
  python2    /home/user/myenv3/share/jupyter/kernels/python2
  python3    /usr/local/share/jupyter/kernels/python3

2)
Uninstall  kernelspec
$ sudo ipython kernelspec uninstall myenv3