edited def init for unsplash class

app.py

@@ -109,16 +109,11 @@ class UnsplashAPI:
     """Simple Unsplash API integration"""
     
     def __init__(self, access_key=None):
-        # Try to get from provided key, Streamlit secrets, or environment
+    # Use environment variable only - no secrets.toml warning
         if access_key:
             self.access_key = access_key
         else:
-            # Try secrets first, but handle the case where secrets don't exist
-            try:
-                self.access_key = st.secrets.get("UNSPLASH_ACCESS_KEY")
-            except (FileNotFoundError, KeyError, AttributeError):
-                # Fall back to environment variable
-                self.access_key = os.environ.get("UNSPLASH_ACCESS_KEY")
+            self.access_key = os.environ.get("UNSPLASH_ACCESS_KEY")
         
         self.base_url = "https://api.unsplash.com"