diff --git a/cpp/src/arrow/compute/kernels/aggregate_mode.cc b/cpp/src/arrow/compute/kernels/aggregate_mode.cc
index fbafa663b86..75786d12b6e 100644
--- a/cpp/src/arrow/compute/kernels/aggregate_mode.cc
+++ b/cpp/src/arrow/compute/kernels/aggregate_mode.cc
@@ -495,7 +495,6 @@ void RegisterScalarAggregateMode(FunctionRegistry* registry) {
       NewModeKernel(boolean(), ModeExecutor<StructType, BooleanType>::Exec,
                     ModeExecutorChunked<StructType, BooleanType>::Exec)));
   for (const auto& type : NumericTypes()) {
-    // TODO(wesm):
     DCHECK_OK(func->AddKernel(
         NewModeKernel(type, GenerateNumeric<ModeExecutor, StructType>(*type),
                       GenerateNumeric<ModeExecutorChunked, StructType>(*type))));