Removed installing from PyPI since OneWire doesn't work on Linux

Author: evaherrada

README.rst

@@ -27,31 +27,6 @@ Please ensure all dependencies are available on the CircuitPython filesystem.
 This is easily achieved by downloading
 `the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.
 
-Installing from PyPI
-====================
-
-On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
-PyPI <https://pypi.org/project/adafruit-circuitpython-ds18x20/>`_. To install for current user:
-
-.. code-block:: shell
-
-    pip3 install adafruit-circuitpython-ds18x20
-
-To install system-wide (this may be required in some cases):
-
-.. code-block:: shell
-
-    sudo pip3 install adafruit-circuitpython-ds18x20
-
-To install in a virtual environment in your current project:
-
-.. code-block:: shell
-
-    mkdir project-name && cd project-name
-    python3 -m venv .env
-    source .env/bin/activate
-    pip3 install adafruit-circuitpython-ds18x20
-
 Usage Example
 =============