doc: update README.md about test execution, remove unused test helper function

README.md

@@ -79,6 +79,19 @@ In this case my 'mutant' test coverage progression (Total jobs: 377 / Complete:
 2. Surviving mutants: 74 (19.63%)
 3. Surviving mutants: 3 (0.80%)
 
+In case of errors on executing the `pytest` files remove the python cache before re-run the tests:
+
+```bash
+find tests -name "__pycache__" -exec rm -rf {} \;
+find aip_trainer -name "__pycache__" -exec rm -rf {} \;
+```
+
+Then execute the tests again:
+
+```bash
+pytest --cov=aip_trainer --cov-report=term-missing && coverage html
+```
+
 ### E2E tests with playwright
 
 Normally I use Visual Studio Code to write and execute my playwright tests, however it's always possible to run them from cli (from the `static` folder, using a node package manager like `npm` or `pnpm`):

tests/lambdas/test_lambdaSpeechToScore.py

@@ -20,17 +20,6 @@ def set_seed(seed=0):
     torch.manual_seed(seed)
 
 
-def get_request_body(language, text, base64_audio=None):
-    body = json.dumps(
-        {
-            "language": language,
-            "title": text,
-            "base64Audio": f"data:audio/ogg;;base64,{base64_audio}",
-        }
-    )
-    return {"body": body}
-
-
 def assert_raises_get_speech_to_score_dict(
     cls, real_text, file_bytes_or_audiotmpfile, language, exc, error_message
 ):