Allow extracting elements holding transcriptions without entities

Closes #254 (closed)

tests/test_extract.py

@@ -435,14 +435,10 @@ def test_extract_transcription_no_translation(mock_database, tokens):
 
     element = Element.get_by_id("test-page_1-line_1")
     # Deleting one of the two transcriptions from the element
-    transcription = Transcription.get(
+    Transcription.get(
         Transcription.element == element,
         Transcription.worker_version_id == "worker_version_id",
-    )
-    TranscriptionEntity.delete().where(
-        TranscriptionEntity.transcription == transcription
-    ).execute()
-    transcription.delete_instance()
+    ).delete_instance(recursive=True)
 
     # Deleting all entities on the element remaining transcription while leaving the transcription intact
     if tokens: