per #1974, updated coding standards section -- Removed links to codin…

…g standards that we don't follow strictly and can cause confusion for new developers. Removed code analysis tool information to avoid having to keep information about external tools up-to-date and we don't strictly enforce using these tools in our development workflow.

docs/Contributors_Guide/coding_standards.rst

@@ -9,3 +9,5 @@ Coding Standards
   docstrings <https://www.python.org/dev/peps/pep-0257/>`_, and
   `Sphinx <http://www.sphinx-doc.org/en/master/>`_ for documentation
 * **NOTE: Please do not use f-strings in the run_metplus.py file so that the Python version check can notify the user of the incorrect version. Using Python 3.5 or earlier will output the SyntaxError from the f-string instead of the useful error message.**
+
+Python code analysis tools like **pylint** can be used to check for errors and violations of PEP8 standards.