[avatar][docs] Remove stale fallback transition attrs docs metadata (#4118)

Author: atomiks

docs/reference/generated/avatar-fallback.json

@@ -22,13 +22,6 @@
       "detailedType": "| ReactElement\n| ((\n    props: HTMLProps,\n    state: Avatar.Fallback.State,\n  ) => ReactElement)"
     }
   },
-  "dataAttributes": {
-    "data-starting-style": {
-      "description": "Present when the fallback is animating in."
-    },
-    "data-ending-style": {
-      "description": "Present when the fallback is animating out."
-    }
-  },
+  "dataAttributes": {},
   "cssVariables": {}
 }

docs/src/app/(docs)/react/components/page.mdx

@@ -184,7 +184,6 @@ An easily stylable avatar component.
     - Data Attributes: data-ending-style, data-starting-style
   - Avatar - Fallback
     - Props: className, delay, render, style
-    - Data Attributes: data-ending-style, data-starting-style
 
 </details>