message: Remove unused private constructor of JsonKeysetReader.
diff: @@ -59,11 +59,6 @@ public final class JsonKeysetReader implements KeysetReader {
  json = null;
  }
  - private JsonKeysetReader(JsonObject json) {
  - this.json = json;
  - this.inputStream = null;
  - }
  -
  /**
  * Static method to create a JsonKeysetReader from an {@link InputStream}.
  *
  