undo adding pytest-mock, not needed yet

Author: mshafer-NI

poetry.lock

@@ -56,7 +56,6 @@ pep8-naming = ">=0.11.1"
 pytest = ">=6.0.1"
 pytest_click = ">=1.0.2"
 pytest-snapshot = ">=0.6.3"
-pytest-mock = ">=3.8.1"
 
 [tool.poetry.scripts]
 ni-python-styleguide = 'ni_python_styleguide._cli:main'