gnu: python-alembic: Move to pyproject-build-system.

* gnu/packages/databases.scm (python-alembic):
  [build-system]: Move to pyproject-build-system.
  [arguments]: Remove field, now uneeded.

Change-Id: I5907ff84412d867d094aae5fb4daa8481eb7f30c
Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu/packages/databases.scm

@@ -3845,12 +3845,7 @@ this library provides functions to facilitate such comparisons.")
        (uri (pypi-uri "alembic" version))
        (sha256
         (base32 "0lxi2g2025lz5k7k5dd5fc1lfijqi2yw6qqyjzp073z6laa8cckw"))))
-    (build-system python-build-system)
-    (arguments
-     '(#:phases (modify-phases %standard-phases
-                  (replace 'check
-                    (lambda _
-                      (invoke "pytest" "-vv"))))))
+    (build-system pyproject-build-system)
     (native-inputs
      (list python-mock python-pytest-cov))
     (propagated-inputs