Delete the script chunks file after processing

Author: pmeenan

internal/process_test.py

@@ -1330,6 +1330,7 @@ def get_script_chunks(self, pages):
                                  'content': c['src'],
                                  'chunk_type': c['type']}
                         chunks.append(chunk)
+                os.unlink(script_chunks_file)
         except Exception:
             logging.exception("Error processing script chunks")