Update specification/protocol/file-exporter.md

Co-authored-by: Robert Pająk <pellared@hotmail.com>

specification/protocol/file-exporter.md

@@ -85,11 +85,7 @@ This is an example showing logs:
 {"resourceLogs":[{"resource":{"attributes":[{"key":"resource-attr","value":{"stringValue":"resource-attr-val-1"}}]},"scopeLogs":[{"scope":{},"logRecords":[{"timeUnixNano":"1581452773000009875","severityNumber":9,"severityText":"Info","body":{"stringValue":"This is a log message"},"attributes":[{"key":"app","value":{"stringValue":"server"}},{"key":"instance_num","value":{"intValue":"1"}}],"droppedAttributesCount":1,"traceId":"08040201000000000000000000000000","spanId":"0102040800000000"},{"timeUnixNano":"1581452773000000789","severityNumber":9,"severityText":"Info","body":{"stringValue":"something happened"},"attributes":[{"key":"customer","value":{"stringValue":"acme"}},{"key":"env","value":{"stringValue":"dev"}}],"droppedAttributesCount":1,"traceId":"","spanId":""}]}]}]}
 ```
 
-## Exporter
-
-### Stdout exporter
-
-#### Configuration
+## Exporter configuration
 
 The metric exporter MUST support the environment variables defined in the
 [OTLP Exporter](../metrics/sdk_exporters/otlp.md#additional-environment-variable-configuration)