Removing the redundant file introduced

[sturmianseq]

This PR aims to improve test reliability of test test_touch_on_new_file by Removing the redundant file introduced by calling method os.remove

The test can fail in this way by running pip3 install pytest-repeat; python3 -m pytest --count=2 fs/tests/test_touch.py::test_touch_on_new_file:

    def test_touch_on_new_file():
    
        new_file = os.path.join(TEST_DIR, "new_file.txt")
    
        if (os.path.exists(new_file)):
>           raise ValueError("File new_file.txt already exists!")
E           ValueError: File new_file.txt already exists!

It may be better to clean state pollutions so that some other tests won't fail in the future due to the shared state pollution.

[chaosmail]

Thanks @sturmianseq, looks good!