Simplify config for fastapi example

Author: KennyVaneetvelde

atomic-examples/fastapi-memory/fastapi_memory/lib/config.py

@@ -13,30 +13,12 @@ def get_api_key() -> str:
         ValueError: If OPENAI_API_KEY environment variable is not set
     """
     api_key = os.getenv("OPENAI_API_KEY")
-    if api_key:
-        return api_key
-
-    # Fallback: Try to load from local .env or monorepo quickstart .env
-    # This is for development convenience in the atomic-monorepo
-    from pathlib import Path
-
-    search_paths = [
-        Path(".env"),
-        Path("..") / "quickstart" / ".env",
-    ]
-
-    for env_path in search_paths:
-        if env_path.exists():
-            try:
-                content = env_path.read_text(encoding="utf-8")
-                for line in content.splitlines():
-                    line = line.strip()
-                    if line.startswith("OPENAI_API_KEY="):
-                        return line.split("=", 1)[1].strip().strip('"').strip("'")
-            except Exception:
-                continue
-
-    raise ValueError("OPENAI_API_KEY environment variable is required. " "Please set it or create a .env file.")
+    if not api_key:
+        raise ValueError(
+            "OPENAI_API_KEY environment variable is required. "
+            "Please set it in your environment before running the application."
+        )
+    return api_key
 
 
 # Constants