Remove setup.py references from docs

README.md

@@ -15,10 +15,10 @@ For information about the support provided for releases, see our [Release Suppor
 Instructions for installing the metcalcpy package locally
 ---------------------------------------------------------
 - activate your conda environment (i.e. 'conda activate your-conda-env-name')
-- from within your active conda environment, cd to the METcalcpy/ directory, where you will see the setup.py script
+- from within your active conda environment, cd to the METcalcpy/ directory, where you will see the file pyproject.toml
 - from this directory, run the following on the command line: pip install -e .
 - the -e option stands for editable, which is useful in that you can update your METcalcpy/metcalcpy source without reinstalling it 
-- the . indicates that you should search the current directory for the setup.py script
+- the . indicates that you should search the current directory for the pyproject.toml file.
 
 - use metcalcpy package via import statement:
   - Examples:

docs/Users_Guide/installation.rst

@@ -39,7 +39,7 @@ METcalcpy source code, e.g. `/User/someuser/METcalcpy`.  From this directory, ru
 
 `pip install -e .`
 
-This instructs pip to install the package based on instructios in the setup.py file located in the current directory
+This instructs pip to install the package based on instructios in the pyproject.toml file located in the current directory
 (as indicated by the '.').  The `-e` directs pip to install the package in edit mode, so if one wishes to make changes
 to this source code, the changes are automatically applied without the need to re-install the package.