Remove legacy code for format conversion

config.example.toml

@@ -13,7 +13,7 @@ request_timeout_seconds = 5
 min_request_interval_seconds = 4
 
 [upload]
-url = "" # Set to https://your-solar-host/index.php?a=relay to enable uploads.
+url = "" # Set a compatible HTTPS receiver URL to enable uploads.
 token = "" # Shared bearer token; enter the real value only in private config.toml.
 batch_size = 100
 request_timeout_seconds = 10