remove unnecessary /cfi/max-ratings redirect

Given that VRO will need to rebuild the API gateway in the VA.gov cloud, we can make the path whatever we'd like. While [the gateway currently in the LHDI cloud uses `Path=/cfi/**`](https://github.com/department-of-veterans-affairs/abd-vro-api-gateway/blob/main/src/main/resources/application-local.yml#L36-L39), we are not bound to that. A redirect will not be necessary either so that I will delete that portion of the code.

Here's an issue to add this API to a VA.gov cloud gateway:
department-of-veterans-affairs/abd-vro#3850

src/python_src/api.py

@@ -1,6 +1,5 @@
 import uvicorn
 from fastapi import FastAPI, HTTPException
-from fastapi.responses import RedirectResponse
 from pydantic_models import (
     MaxRatingsForClaimForIncreaseRequest,
     MaxRatingsForClaimForIncreaseResponse,
@@ -36,14 +35,10 @@ def get_health_status() -> dict[str, str]:
     return {'status': 'ok'}
 
 
-@app.post('/max-ratings')
-def redirect_max_ratings() -> RedirectResponse:
-    """
-    Redirects the old /max-ratings endpoint to the new /disability-max-ratings endpoint.
-    """
-    return RedirectResponse(url='/disability-max-ratings')
-
-
+# TODO: Update API gateway configuration when migrating to VA.gov cloud.
+# The path '/disability-max-ratings' is designed to be more descriptive and domain-specific,
+# replacing the legacy '/cfi/max-ratings' path that was specific to LHDI cloud.
+# This will require new API gateway configuration in the VA.gov cloud environment. For more details, see: https://github.com/department-of-veterans-affairs/abd-vro/issues/3850
 @app.post('/disability-max-ratings')
 def get_max_ratings(
     claim_for_increase: MaxRatingsForClaimForIncreaseRequest,

tests/test_api.py

@@ -1,23 +1,12 @@
 from fastapi.testclient import TestClient
 
 MAX_RATING = '/disability-max-ratings'
-LEGACY_ENDPOINT = '/max-ratings'
 
 TINNITUS = {'diagnostic_code': 6260, 'max_rating': 10}
 TUBERCULOSIS = {'diagnostic_code': 7710, 'max_rating': 100}
 NOT_RATED = {'diagnostic_code': 9999}
 
 
-def test_redirect_from_legacy_endpoint(client: TestClient) -> None:
-    """Test that the legacy endpoint redirects to the new endpoint"""
-    json_post_dict = {'diagnostic_codes': [TINNITUS['diagnostic_code']]}
-
-    response = client.post(LEGACY_ENDPOINT, json=json_post_dict, allow_redirects=False)
-
-    assert response.status_code == 307  # Temporary Redirect
-    assert response.headers['location'] == MAX_RATING
-
-
 def test_max_rating_with_no_dc(client: TestClient):
     json_post_dict = {'diagnostic_codes': []}