Use pyproject.toml to conform with PEP 621

tests/fixtures/fixtures.py

@@ -1,8 +1,5 @@
 import glob
 import os
-import sys
-
-sys.path.append(".")
 
 import pytest
 from IPython.core.interactiveshell import InteractiveShell

tests/test_v1.py

@@ -3,14 +3,10 @@ import math
 import os
 import re
 import shutil
-import sys
 from typing import List
 
 import pytest
 
-sys.path.append(".")
-
-
 from nvcc4jupyter.plugin import NVCCPlugin
 
 
@@ -42,9 +38,9 @@ def copy_source_to_group(
 
 @pytest.fixture(autouse=True, scope="function")
 def before_each(plugin: NVCCPlugin):
-    shutil.rmtree(plugin.workdir, ignore_errors=True) # before test
+    shutil.rmtree(plugin.workdir, ignore_errors=True)  # before test
     yield
-    pass # after test
+    pass  # after test
 
 
 def test_save_source(plugin: NVCCPlugin, sample_cuda_code: str) -> None: