perf: remove soundswallower from Heroku reqs

Author: joanise

Diff for: .github/workflows/tests.yml

@@ -146,5 +146,5 @@ jobs:
 
       - name: unit test the web API
         run: |
-          pip install -e .[dev]
+          pip install httpx
           python test/test_web_api.py

Diff for: bin/post_compile

@@ -1,4 +1,4 @@
 #!/bin/sh
 
 # Heroku expects to run your app in place, but doesn't actually do this for you
-pip install -e .
+pip install -e . --no-deps

Diff for: requirements.txt

@@ -100,7 +100,6 @@ requests==2.32.3
     # via hatch.envs.prod
 sniffio==1.3.1
     # via anyio
-soundswallower==0.6.5
     # via hatch.envs.prod
 starlette==0.41.3
     # via fastapi