chore: cleanup unused backend code after migration to server functions

backend/src/rate_limit.rs

@@ -1,16 +1,3 @@
-use governor::clock::QuantaInstant;
-use governor::middleware::NoOpMiddleware;
-use tower_governor::governor::GovernorConfig;
-use tower_governor::governor::GovernorConfigBuilder;
-use tower_governor::key_extractor::SmartIpKeyExtractor;
-
-pub fn get_login_rate_limit_config() -> GovernorConfig<SmartIpKeyExtractor, NoOpMiddleware<QuantaInstant>> {
-    // 5 yanlış denemeden sonra bloklanır.
-    // Her yeni hak için 60 saniye (1 dakika) bekleme süresi.
-    GovernorConfigBuilder::default()
-        .key_extractor(SmartIpKeyExtractor)
-        .per_second(60) 
-        .burst_size(5)
-        .finish()
-        .unwrap()
-}
+// This file can be removed or repurposed if rate limiting is needed for other endpoints.
+// Login rate limiting is now handled within the server function or needs to be reimplemented
+// as a middleware for the server function endpoint.