refactor: clean up unused imports and improve code organization

src/transformers/transformers.py

@@ -4,9 +4,8 @@ import json
 import re
 from dataclasses import dataclass
 from dataclasses import field as dataclass_field
-from typing import Any, List, Optional
+from typing import Any, List
 
-from pydantic import BaseModel, Field
 
 
 from src.logic.dataclass import BookData
@@ -171,13 +170,13 @@ class ARRAYData:
                 )
                 signature_data = eval(sig_data)
                 return signature_data["signatur"]
-            except Exception as e:
+            except Exception:
                 return None
 
         def _get_author(data):
             try:
                 array = data.split("[au_display_short]")[1].split(")\n")[0].strip()
-            except Exception as e:
+            except Exception:
                 return ""
             entries = array.split("\n")
             authors = []