style: clean up unused parameters and imports in examples

examples/03_backends.py

@@ -11,8 +11,8 @@ from fastapi.responses import JSONResponse
 
 from fastapi_traffic import (
     MemoryBackend,
-    RateLimitExceeded,
     RateLimiter,
+    RateLimitExceeded,
     SQLiteBackend,
     rate_limit,
 )
@@ -32,9 +32,10 @@ def get_backend():
         # Redis - Required for distributed/multi-instance deployments
         # Requires: pip install redis
         try:
-            from fastapi_traffic import RedisBackend
             import asyncio
 
+            from fastapi_traffic import RedisBackend
+
             async def create_redis():
                 return await RedisBackend.from_url(
                     os.getenv("REDIS_URL", "redis://localhost:6379/0"),
@@ -56,7 +57,7 @@ limiter = RateLimiter(backend)
 
 
 @asynccontextmanager
-async def lifespan(app: FastAPI):
+async def lifespan(_: FastAPI):
     await limiter.initialize()
     set_limiter(limiter)
     yield
@@ -67,7 +68,7 @@ app = FastAPI(title="Storage Backends Example", lifespan=lifespan)
 
 
 @app.exception_handler(RateLimitExceeded)
-async def rate_limit_handler(request: Request, exc: RateLimitExceeded) -> JSONResponse:
+async def rate_limit_handler(_: Request, exc: RateLimitExceeded) -> JSONResponse:
     return JSONResponse(
         status_code=429,
         content={"error": "rate_limit_exceeded", "retry_after": exc.retry_after},
@@ -76,7 +77,7 @@ async def rate_limit_handler(request: Request, exc: RateLimitExceeded) -> JSONRe
 
 @app.get("/api/resource")
 @rate_limit(100, 60)
-async def get_resource(request: Request) -> dict[str, str]:
+async def get_resource(_: Request) -> dict[str, str]:
     return {"message": "Resource data", "backend": type(backend).__name__}