This reverts commit cbc6aed8fa.
picotool 2.1.1 has a dependency to mbedtls whose CMakeLists.txt refers
to a horrendously old and nowadays unsupported version of cmake. This
breaks the build for our project, since we use cmake 4.0.0 at the time
of writing - and this version dropped support for cmake < 3.5.
This problem has been fixed in picotool 2.2.0 which, unfortunately, is
not yet available in micropython v1.26.0.
This directory contains third-party, low-level C libraries and SDKs.
Libraries that do not target any specific platform are generally chosen
based on them being independent and efficient.
281615c157