diff --git a/src/substrait/common/Io.cpp b/src/substrait/common/Io.cpp
index 69d61cf8..ba9ed972 100644
--- a/src/substrait/common/Io.cpp
+++ b/src/substrait/common/Io.cpp
@@ -13,7 +13,6 @@ namespace io::substrait {
 
 namespace {
 
-// TODO - Avoid capturing.
 const std::regex kIsJson(R"(("extensionUris"|"extensions"|"relations"))");
 const std::regex kIsProtoText(
     R"((^|\n)((relations|extensions|extension_uris|expected_type_urls) \{))");