refactor: remove unused avatar utility functions and re-export statements

Author: chahatkesh

src/utils/avatarService.jsx

@@ -3,10 +3,7 @@
  * Provides React components for avatar rendering
  */
 import React, { useState } from 'react';
-import { generateAvatarUrl, getUserAvatarUrl, getAvailableStyles, generateInitials } from './avatarUtils';
-
-// Re-export utility functions for convenience
-export { generateAvatarUrl, getUserAvatarUrl, getAvailableStyles, generateInitials };
+import { getUserAvatarUrl, generateInitials } from './avatarUtils';
 
 /**
  * Avatar Image Component with fallback