Doc cleanup to remove poetry references

Signed-off-by: Travis F. Collins <[email protected]>

docs/developers.md

@@ -1,11 +1,22 @@
 # Developer documentation
 
-**pyadi-jif** uses a modern python flow based around [Poetry](https://python-poetry.org) and [Nox](https://nox.thea.codes/en/stable/). This is done to keep development isolated from the rest of developer's system
+**pyadi-jif** uses a modern python flow based around [Nox](https://nox.thea.codes/en/stable/). This is done to keep development isolated from the rest of developer's system and have consistent testing.
 
 ## Set up python
 
 Python 3.8 is required for development as it is considered the _target_ release. **Nox** tests other variants when available as well but 3.8 is required. If you do not have 3.8 installed the recommended option is to use [pyenv](https://github.com/pyenv/pyenv)
 
+Alternatively, using plane older virtualenvs is good option as well. Run the following commands to set up a virtualenv:
+
+
+```bash
+python3 -m venv venv
+# Linux/macOS
+source venv/bin/activate
+# Windows
+venv\Scripts\activate.bat
+```
+
 ### Install pyenv
 
 **pyenv** is a handy tool for installing different and isolated versions of python on your system. Since distributions can ship with rather random versions of python, pyenv can help install exactly the versions required. The quick way to install pyenv is with their bash script:
@@ -34,17 +45,14 @@ Install the desired python version
 
 ```
 
-## Set up poetry
+## Set up Nox
 
-**Poetry** manages the virtual environment for the project which includes the dependencies. **Poetry** can be installed manually or the _Makefile_ can be leveraged as at this point a valid version of Python is installed. To install poetry and set up the environment run:
+Nox is a python automation tool that allows you to define reusable tasks in a `noxfile.py`. It is used to run tests, linters, and other tasks. To install nox:
 
 ```bash
-
-make dev
-
+pip install nox
 ```
 
-If you already have poetry installed it is not reinstalled.
 
 ## Using make
 
@@ -65,7 +73,6 @@ coverage             run test with coverage enabled
 lint                 format and lint code
 docs                 build documentation
 install              install module
-dev                  setup development environment
 
 ```
 
@@ -84,37 +91,3 @@ and the tests:
 ```bash
 make test
 ```
-
-## Poetry dependencies
-
-Poetry can be a little inconsistent (buggy) when dealing with dependencies that are considered extra (optional is what everyone else on the planet calls them) and groups. Here are the commands to use:
-
-Just installed the *required* dependencies
-```bash
-poetry install --no-root
-```
-
-Install a solver
-```bash
-poetry install --no-root -E cplex
-```
-
-or
-```bash
-poetry install --no-root -E gekko
-```
-
-Install both solvers
-```bash
-poetry install --no-root -E cplex -E gekko
-```
-
-Install development packages
-```bash
-poetry install --no-root --with dev
-```
-
-Install development packages with a solver
-```bash
-poetry install --no-root --with dev -E cplex
-```