This reverts commit c7aec47e5e3a3ff7b5fdaa11cd1e62cae6746acb.
The original commit replaces 'which' with 'command'. Sadly most of
them are not equivalent and for 'which -a', there is no easy
replacements that would not reimplement PATH parsing logic. Hence
revert. Keeping a dependency on which is absolutely fine.
Signed-off-by: Clemens Fruhwirth <clemens@endorphin.org>
(cherry picked from commit 1f5e7224868109a170a9248d18f8d2b6124e9c5a)
27c5db998c
