Add missing Pyflakes (#458)

Specially
F401 	unused-import
that I was missing
https://beta.ruff.rs/docs/rules/#pyflakes-f

pyproject.toml

@@ -47,7 +47,7 @@ ignore_missing_imports = true
 [tool.ruff]
 line-length = 101
 target-version = "py37"
-select = ["W", "I", "UP", "YTT", "B", "A", "DTZ", "T10",
+select = ["F", "W", "I", "UP", "YTT", "B", "A", "DTZ", "T10",
 "EXE", "ISC", "ICN", "G", "INP", "PIE", "PYI", "Q", "RSE", "SLF", "TID", "PL",
 "COM", "C4", "PT", "RET", "SIM", "PTH", "PGH", "PL", "TRY", "RUF"]
 ignore = ["PLR2004", "PLR0913"]

tests/unit/test_g1_monetary_license.py

@@ -13,7 +13,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with Silkaj. If not, see <https://www.gnu.org/licenses/>.
 
-from pathlib import Path
 from unittest.mock import patch
 
 import pytest