[pytx] Remove docker run from README.md (#1629)

python-threatexchange/README.md

@@ -8,34 +8,20 @@ To get similar functionality in a deployable service, check out hasher-matcher-a
 
 ![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/facebook/ThreatExchange/python-threatexchange-ci.yaml?branch=main) ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/threatexchange) ![PyPI - Downloads](https://img.shields.io/pypi/dm/threatexchange) ![PyPI](https://img.shields.io/pypi/v/threatexchange) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
-## Run the CLI in Docker container
-
-A Dockerfile is provided which allows you to run the CLI with minimal dependencies.
+## Installation
 
-First build the container:
+If you don't have `pip`, learn how to install it [here](https://pip.pypa.io/en/stable/installation/).
 
+```bash
+$ python3 -m pip install threatexchange --upgrade
 ```
-$ docker build --tag threatexchange .
-```
-
-Then run:
 
-```
-$ docker run threatexchange
-```
+### Docker File
 
-To persist the configuration and data between invocations, mount the `/var/lib/threatexchange` volume:
+A Dockerfile is provided which allows you to run the CLI with minimal dependencies.
 
 ```
-$ docker run --volume $HOME/.threatexchange:/var/lib/threatexchange
-```
-
-## Installation
-
-If you don't have `pip`, learn how to install it [here](https://pip.pypa.io/en/stable/installation/).
-
-```bash
-$ python3 -m pip install threatexchange --upgrade
+$ docker build --tag threatexchange .
 ```
 
 # Introduction