build-system/pyproject: Use copy-recursively instead of merge-dirs.

Using rename-file, the destination had to be empty otherwise it would error
out.  This has been fixed by the use of copy-recursively, really merging them.
Changing this makes merge-directories mostly a duplicate of
copy-recursively, thus fully switch to copy-recursively.

* guix/build/pyproject-build-system.scm (install)
<python-hashbang>: Remove it, used only once.
<merge-directories>: Remove it, replace its calls by copy-recursively
and delete-file-recursively.

Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

0 files changed, 0 insertions, 0 deletions