NRL-787 Fix warnings in integration tests due to pointer already deleted

Author: axelkrastek1-nhs

tests/features/steps/1_setup.py

@@ -55,5 +55,5 @@ def create_document_reference_step(context: Context):
 
 def clean_up_test_pointer(context: Context, doc_pointer: DocumentPointer):
     """Remove a pointer during cleanup without failing if it has already been deleted"""
-    with suppress(Exception):
+    if context.repository.get_by_id(doc_pointer.id):
         context.repository.delete(doc_pointer)