Remove unused commands from the custom hardware configuration documentation (#2343)

## Description

#2255 introduced a new, cross-platform method for monitoring hardware
and removed the custom shell commands that had been used previously.
This PR updates the documentation to reflect the removal of those
commands from hardwareConfig.json.

## Meta

Merge checklist:
- [x] Pull Request title is [short, imperative
summary](https://cbea.ms/git-commit/) of proposed changes
- [x] The description documents the _what_ and _why_, including events
that led to this PR
- [ ] If this PR changes behavior or adds a feature, user documentation
is updated
- [ ] If this PR touches photon-serde, all messages have been
regenerated and hashes have not changed unexpectedly
- [ ] If this PR touches configuration, this is backwards compatible
with all settings going back to the previous seasons's last release
(seasons end after champs ends)
- [ ] If this PR touches pipeline settings or anything related to data
exchange, the frontend typing is updated
- [ ] If this PR addresses a bug, a regression test for it is added

---------

Co-authored-by: Gold856 <117957790+Gold856@users.noreply.github.com>

photon-core/src/main/java/org/photonvision/common/configuration/SqlConfigProvider.java

@@ -269,7 +269,7 @@ public class SqlConfigProvider extends ConfigProvider {
         } else {
             logger.debug("No " + ref.getSimpleName() + " in database");
         }
-        // either the config entry is empty or Jackson threw and exception
+        // either the config entry is empty or Jackson threw an exception
         try {
             configObj = factory.get();
             logger.info("Loaded default " + ref.getSimpleName());