--- a/ipc/ipdl/test/cxx/IPDLUnitTests.template.cpp
+++ b/ipc/ipdl/test/cxx/IPDLUnitTests.template.cpp
@@ -93,31 +93,16 @@ IPDLUnitTestFromString(const char* const
 //===== TEMPLATED =====
 ${STRING_TO_ENUMS}
 //-----------------------------------------------------------------------------
     else
         return static_cast<IPDLUnitTestType>(0);
 }
 
 
-const char*
-IPDLUnitTestToString(IPDLUnitTestType aTest)
-{
-    switch (aTest) {
-//-----------------------------------------------------------------------------
-//===== TEMPLATED =====
-${ENUM_TO_STRINGS}
-//-----------------------------------------------------------------------------
-
-    default:
-        return nullptr;
-    }
-}
-
-
 IPDLUnitTestType
 IPDLUnitTest()
 {
     return IPDLUnitTestFromString(::mozilla::_ipdltest::IPDLUnitTestName());
 }
 
 
 } // namespace <anon>

--- a/ipc/ipdl/test/cxx/TestDataStructures.cpp
+++ b/ipc/ipdl/test/cxx/TestDataStructures.cpp
@@ -22,22 +22,16 @@ assert_arrays_equal(const InfallibleTArr
 }
 
 inline static TestDataStructuresSub&
 Cast(PTestDataStructuresSubParent* a)
 {
     return *static_cast<TestDataStructuresSub*>(a);
 }
 
-inline static TestDataStructuresSub&
-Cast(PTestDataStructuresSubChild* a)
-{
-    return *static_cast<TestDataStructuresSub*>(a);
-}
-
 //-----------------------------------------------------------------------------
 // parent
 
 TestDataStructuresParent::TestDataStructuresParent()
 {
     MOZ_COUNT_CTOR(TestDataStructuresParent);
 }