diff --git a/lib/ParseSIL/ParseSIL.cpp b/lib/ParseSIL/ParseSIL.cpp
index 34f132ca8d72c..0e33f0c1267b4 100644
--- a/lib/ParseSIL/ParseSIL.cpp
+++ b/lib/ParseSIL/ParseSIL.cpp
@@ -180,10 +180,8 @@ namespace {
                                 GenericEnvironment *GenericEnv = nullptr,
                                 DeclContext *DC = nullptr);
 
-    /*
     void convertRequirements(SILFunction *F, ArrayRef<RequirementRepr> From,
                              SmallVectorImpl<Requirement> &To);
-     */
 
     ProtocolConformance *
     parseProtocolConformanceHelper(ProtocolDecl *&proto,
@@ -196,10 +194,6 @@ namespace {
           TUState(*static_cast<SILParserTUState *>(P.SIL)),
           ParsedTypeCallback([](Type ty) {}) {}
 
-    // SWIFT_ENABLE_TENSORFLOW
-    void convertRequirements(SILFunction *F, ArrayRef<RequirementRepr> From,
-                             SmallVectorImpl<Requirement> &To);
-
     /// diagnoseProblems - After a function is fully parse, emit any diagnostics
     /// for errors and return true if there were any.
     bool diagnoseProblems();
diff --git a/test/Serialization/differentiable_attr.swift b/test/Serialization/differentiable_attr.swift
index 16a3d6f672c35..f7bb54942b3d7 100644
--- a/test/Serialization/differentiable_attr.swift
+++ b/test/Serialization/differentiable_attr.swift
@@ -1,5 +1,4 @@
 // SWIFT_ENABLE_TENSORFLOW
-// TODO: Handle trailing where clause in @differentiable attribute.
 
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend %s -emit-module -parse-as-library -o %t