Remove dependency on mock

pyproject.toml

@@ -40,7 +40,7 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 data = ["pandas"]
-development = ["pytest", "mock", "flake8", "pytest-cov", "pytest-doctestplus"]
+development = ["pytest", "flake8", "pytest-cov", "pytest-doctestplus"]
 docs = ["pandas", "sphinx", "sphinx_rtd_theme"]
 
 [project.scripts]

tests/scripts/test_ongc.py

@@ -23,9 +23,10 @@
 # SOFTWARE.
 #
 
+from unittest import mock
+
 from click.testing import CliRunner
 import os.path
-import mock
 
 from pyongc.scripts import ongc
 from pyongc import __version__ as version

tests/test_data.py

@@ -23,11 +23,10 @@
 # SOFTWARE.
 #
 
+from unittest import mock
 import pandas as pd
 import pytest
 
-import mock
-
 from pyongc import data
 
 

tests/test_ongc.py

@@ -23,10 +23,10 @@
 # SOFTWARE.
 #
 
+from unittest import mock
 import pytest
 
 import json
-import mock
 import numpy as np
 
 from pyongc import ongc, exceptions