cmNinjaUtilityTargetGenerator: Remove leftover development comment

Source/cmNinjaUtilityTargetGenerator.cxx

@@ -122,8 +122,6 @@ void cmNinjaUtilityTargetGenerator::WriteUtilBuildStatements(
     std::copy(util_outputs.begin(), util_outputs.end(),
               std::back_inserter(gg->GetByproductsForCleanTarget()));
   }
-  // TODO: Does this need an output config?
-  // Does this need to go in impl-<config>.ninja?
   lg->AppendTargetDepends(genTarget, deps, config, fileConfig,
                           DependOnTargetArtifact);