Minor corrections in installation docs

Author: blnicho

doc/OnlineDocs/getting_started/installation.rst

@@ -42,18 +42,16 @@ the following in a shell:
    pip install pyomo
 
 
-Conditional Dependencies
-~~~~~~~~~~~~~~~~~~~~~~~~
+Optional Dependencies
+~~~~~~~~~~~~~~~~~~~~~
 
 Extensions to Pyomo, and many of the contributions in ``pyomo.contrib``,
-often have conditional dependencies on a variety of third-party Python
+often depend on additional third-party Python
 packages including but not limited to: matplotlib, networkx, numpy,
-openpyxl, pandas, pint, pymysql, pyodbc, pyro4, scipy, sympy, and
-xlrd. 
+openpyxl, pandas, pint, scipy, sympy, and xlrd.
 
 A full list of optional dependencies can be found in Pyomo's
-``pyproject.toml`` under the ``[project.optional-dependencies]`` table.
-They can be displayed by running:
+``setup.py``. They can be displayed by running:
 
 ::
 
@@ -65,14 +63,14 @@ They can be displayed by running:
 Pyomo extensions that require any of these packages will generate
 an error message for missing dependencies upon use.
 
-When using *pip*, all conditional dependencies can be installed at once
+When using *pip*, all optional dependencies can be installed at once
 using the following command:
 
 ::
 
    pip install 'pyomo[optional]'
 
-When using *conda*, many of the conditional dependencies are included
+When using *conda*, many of the optional dependencies are included
 with the standard Anaconda installation.
 
 You can check which Python packages you have installed using the command