refactor: remove unnecessary id fields from slide master and presentation JSON

Author: ya7010

examples/presentation_tree.json

@@ -302,7 +302,6 @@
   ],
   "slide_masters": [
     {
-      "id": 4407743248,
       "shapes": [
         {
           "name": "Title Placeholder 1",

src/tppt/_pptx/tree.py

@@ -162,7 +162,6 @@ def slide_layout_to_dict(slide_layout: Any) -> dict[str, Any]:
 def slide_master_to_dict(slide_master: Any) -> dict[str, Any]:
     """Convert slide master to dictionary"""
     master_data = {
-        "id": id(slide_master),
         "shapes": [shape_to_dict(shape) for shape in slide_master.shapes],
         "placeholders": [
             placeholder_to_dict(placeholder)