remove readme image for pypi

Author: v0lta

README.rst

@@ -1,10 +1,5 @@
-.. |favicon| image:: https://raw.githubusercontent.com/v0lta/PyTorch-Wavelet-Toolbox/main/docs/favicon/favicon.ico
-    :alt: Shannon-wavelet favicon
-    :width: 32
-    :target: https://pypi.org/project/ptwt/
-
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-|favicon| Pytorch Wavelet Toolbox (`ptwt`) 
+Pytorch Wavelet Toolbox (`ptwt`) 
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 .. image:: https://github.com/v0lta/PyTorch-Wavelet-Toolbox/actions/workflows/tests.yml/badge.svg