diff --git a/torchgen/api/cpp.py b/torchgen/api/cpp.py
index c46f265b515..7695367a030 100644
--- a/torchgen/api/cpp.py
+++ b/torchgen/api/cpp.py
@@ -99,22 +99,16 @@ def valuetype_type(
     *,
     binds: ArgName,
     mutable: bool = True,
-    remove_non_owning_ref_types: bool = False,
     symint: bool = False,
 ) -> NamedCType | None:
     if isinstance(t, BaseType):
-        if t.name == BaseTy.Tensor or t.name == BaseTy.Scalar:
+        if t.name in (BaseTy.Tensor, BaseTy.Scalar):
             return None
         elif str(t) == "SymInt":
             if symint:
                 return NamedCType(binds, BaseCType(SymIntT))
             else:
                 return NamedCType(binds, BaseCType(longT))
-        if remove_non_owning_ref_types:
-            if t.name == BaseTy.str:
-                raise AssertionError(
-                    "string ref->value conversion: not implemented yet"
-                )
         # All other BaseType currently map directly to BaseCppTypes.
         return NamedCType(binds, BaseCType(BaseTypeToCppMapping[t.name]))
     elif isinstance(t, OptionalType):
@@ -150,7 +144,6 @@ def argumenttype_type(
         binds=binds,
         mutable=mutable,
         symint=symint,
-        remove_non_owning_ref_types=remove_non_owning_ref_types,
     )
     if r is not None:
         return r
diff --git a/torchgen/executorch/api/et_cpp.py b/torchgen/executorch/api/et_cpp.py
index 554a63864e0..d09f0079197 100644
--- a/torchgen/executorch/api/et_cpp.py
+++ b/torchgen/executorch/api/et_cpp.py
@@ -67,7 +67,6 @@ def valuetype_type(
     t: Type,
     *,
     binds: ArgName,
-    remove_non_owning_ref_types: bool = False,
 ) -> NamedCType | None:
     if isinstance(t, BaseType):
         if t.name == BaseTy.Tensor or t.name == BaseTy.Scalar:
@@ -75,11 +74,6 @@ def valuetype_type(
         # For SymInt we simply treat it as int.
         elif str(t) == "SymInt":
             return NamedCType(binds, BaseCType(BaseTypeToCppMapping[BaseTy.int]))
-        if remove_non_owning_ref_types:
-            if t.name == BaseTy.str:
-                raise AssertionError(
-                    "string ref->value conversion: not implemented yet"
-                )
         # All other BaseType currently map directly to BaseCppTypes.
         return NamedCType(binds, BaseCType(BaseTypeToCppMapping[t.name]))
     elif isinstance(t, OptionalType):
@@ -114,7 +108,6 @@ def argumenttype_type(
     r = valuetype_type(
         t,
         binds=binds,
-        remove_non_owning_ref_types=remove_non_owning_ref_types,
     )
     if r is not None:
         return r