chore: Remove legacy markdown for Avatar Style API

Author: teodoranemes

src/avatar/interfaces.ts

@@ -63,17 +63,6 @@ export interface AvatarProps {
   imgUrl?: string;
 
   /**
-   * Specifies an object of selectors and properties that are used to apply custom styles.
-   *
-   * - `root.background` (string) - (Optional) Background of the avatar.
-   * - `root.borderColor` (string) - (Optional) Border color of the avatar.
-   * - `root.borderRadius` (string) - (Optional) Border radius of the avatar.
-   * - `root.borderWidth` (string) - (Optional) Border width of the avatar.
-   * - `root.boxShadow` (string) - (Optional) Box shadow of the avatar.
-   * - `root.color` (string) - (Optional) Text color of the avatar.
-   * - `root.focusRing.borderColor` (string) - (Optional) Focus ring border color.
-   * - `root.focusRing.borderRadius` (string) - (Optional) Focus ring border radius.
-   * - `root.focusRing.borderWidth` (string) - (Optional) Focus ring border width.
    * @awsuiSystem core
    */
   style?: AvatarProps.Style;