Update Building-a-Visual-Robot-Model-with-URDF-from-Scratch.rst (#3071)

I believe the bug with respect to locale was fixed a while back ros/urdfdom_headers#42 so setting LC_NUMERIC is no longer necessary

(cherry picked from commit 611f948)

source/Tutorials/Intermediate/URDF/Building-a-Visual-Robot-Model-with-URDF-from-Scratch.rst

@@ -28,19 +28,6 @@ If not, please update your installation to include that package (use ``rosdep``
 
 All of the robot models mentioned in this tutorial (and the source files) can be found in the `urdf_tutorial <https://index.ros.org/p/urdf_tutorial>`_ package.
 
-To make sure the shapes defined in the urdf files are parsed correctly, the Linux environment variable ``LC_NUMERIC`` needs to be set to ``en_US.UTF-8``.
-This has to be done every time you open a terminal:
-
-.. code-block:: console
-
-    LC_NUMERIC="en_US.UTF-8"
-
-To permanently set this environment variable, execute the following command in a terminal:
-
-.. code-block:: console
-
-    echo 'export LC_NUMERIC="en_US.UTF-8"' >> ~/.bashrc
-
 One Shape
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