Add support for removing calib coefficients (#2150)

## Description

Adds the ability to remove old calibrations. This might be helpful if
you have a bad calibration.

closes #1262

## 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_
- [ ] 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 settings back to v2025.3.2
- [ ] 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-server/src/main/java/org/photonvision/server/Server.java

@@ -148,6 +148,7 @@ public class Server {
         // Calibration
         app.post("/api/calibration/end", RequestHandler::onCalibrationEndRequest);
         app.post("/api/calibration/importFromData", RequestHandler::onDataCalibrationImportRequest);
+        app.post("/api/calibration/remove", RequestHandler::onCalibrationRemoveRequest);
 
         // Object detection
         app.post("/api/objectdetection/import", RequestHandler::onImportObjectDetectionModelRequest);