Remove the DSDL compilation command

[pavel-kirienko]

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See https://github.com/OpenCyphal/pycyphal/issues/153

Also remove related options like --path

[pavel-kirienko]

New installation instructions would be like:

pip install yakut
echo "export CYPHAL_PATH='$HOME/.cyphal'" >> ~/.bashrc
mkdir ~/.cyphal
wget https://github.com/OpenCyphal/public_regulated_data_types/archive/refs/heads/master.zip
unzip master.zip -d ~/.cyphal
mv -f ~/.cyphal/public_regulated_data_types*/* ~/.cyphal

[pavel-kirienko]

The user guide doesn't mention this command since https://github.com/OpenCyphal/yakut/pull/77 due to its pending removal.

A related task is the removal of --path/YAKUT_PATH which should be done in the same changeset; these parameters are not needed and should not be used as of v0.10. The only path variable the user needs to be concerned about is CYPHAL_PATH.