fix: add missing comments to noOpLogger methods and remove deprecated output.format

- Add comments to all noOpLogger methods to satisfy revive exported rule
- Remove deprecated output.format option (use default format instead)

This fixes the linting issues:
- exported: exported method noOpLogger.* should have comment or be unexported
- warning about deprecated output.format option

.golangci.yml

@@ -47,6 +47,5 @@ issues:
         - revive
 
 output:
-  format: colored-line-number
   print-issued-lines: true
   print-linter-name: true