Remove torbutton and win32 directories from dist.tpo
I think we should remove the two following directories:
https://dist.torproject.org/torbutton/
https://dist.torproject.org/win32/
The `torbutton` directory contains an old version of torbutton. Downloading this version of torbutton and using it is probably not a good idea.
The `win32` directory contains a old version of Tor for Windows, which should probably not be used anymore. Instead Windows users should use the "expert bundle" which can be found in the torbrowser directory.
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