Revert "doc/development: update dependencies"
Revert "doc/development: update dependencies"

This reverts commit 6b3ba69e66ada8d2c504545287bad89bfa2a2c6c.
tests/stubs/ has stubbed out commands supplied by shadow-utils, it is
not in fact a requirement for testing.

coreos/ignition,ajeddeloh/ignition,coreos/ignition,dgonyeo/ignition,ajeddeloh/ignition,ajeddeloh/ignition,dgonyeo/ignition,dgonyeo/ignition,coreos/ignition