Remove redundant entries for dateutil

Author: raccube

programming/python/libraries.md

@@ -32,14 +32,12 @@ The following python libraries are installed and available for use in your robot
 * [pillow 8.3.2](https://pypi.org/project/Pillow/)
 * pkg-resources 57.4.0
 * [pydantic 1.8.2](https://pypi.org/project/pydantic)
-* [dateutil 2.8.2](https://pypi.org/project/python-dateutil/)
 * [pyparsing 2.4.7](https://pypi.org/project/pyparsing)
 * [pyquaternion 0.9.9](https://pypi.org/project/pyquaternion)
 * [pyserial 3.5](https://pypi.org/project/pyserial)
 * [pytz 2021.1](https://pypi.org/project/pytz)
 * [pyudev 0.22.0](https://pypi.org/project/pyudev)
 * [pyusb 1.2.1](https://pypi.org/project/pyusb)
-* [dateutil 2.8.2](https://pypi.org/project/python-dateutil/)
 * [rpm 4.16.1.3](https://pypi.org/project/rpm)
 * [setuptools 57.4.0](https://pypi.org/project/setuptools)
 * [six 1.16.0](https://pypi.org/project/six)