During the migration to 3.13 it was suggested to use `make build -j` toautomatically speed up the building process of the documentation to useall available cores. This is red herring in two different ways: * `make`'s `-j` flag can be used to parallelise the processing of   `make` target dependencies instead of magically apply parallelisation   to the underlying commands. In our case the `make build` command has   a sequential sequence of dependencies (venv -> setup -> do_build) so   no actual parallelisation is achieved when passing `-j`.   `sphinx-build` can be parallelised by giving *it* a `-j` flag,   which we already do (`-j auto`). In other words, there's nothing to   do on our side to speed things up even further. What we *do* have   though is a `make` `SPHINX_JOBS` variable, which acts as the argument   to `sphinx-build -j`. Using this users can reduce the number of CPUs   they want to use for the build process. * Secondly, an empty `make -j` option (i.e., without a number   afterwards), contrary to popular belief, runs as many recipes in   parallel as possible [1], *with no regards to the number of available   cores*. In most scenarios this is fine because the number of   dependencies for a given target isn't that great, or because the   target instructions are not that heavy, but it can generate   difficult-to-understand problems on occasion. For example, if you are   building a shared library that consists on 250 files of heavy C++,   you'll end up spawning 250 C++ compilers at the same time, which   surely will consume all the memory of your computer, causing them to   be OOM-killed. Bottom-line is: never use -j without a value.Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

8.1 introduces the built-in cvw/cwe roles. During the migration therequirement was bumped to 8.1 while trying to sort out a problem withthe pypi role, which turned out to be the cpython submodule not beingcommitted/pushed properly earlier, and hence the update wasn't necessary(and broke things).Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

These are already defined in cpython's, let's thus remove the amount ofoverriding we need to provide.Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>