diff --git a/gen/src/write.rs b/gen/src/write.rs
index 1222eff33..bdcb8960e 100644
--- a/gen/src/write.rs
+++ b/gen/src/write.rs
@@ -1803,18 +1803,6 @@ fn write_shared_ptr(out: &mut OutFile, key: NamedImplKey) {
     );
     writeln!(out, "}}");
     begin_function_definition(out);
-    writeln!(
-        out,
-        "void cxxbridge1$shared_ptr${}$from_unmanaged(::std::shared_ptr<{}>* ptr, void* data) noexcept {{",
-        instance, inner,
-    );
-    writeln!(
-        out,
-        "new (ptr) std::shared_ptr<{}>(static_cast<{}*>(data));",
-        inner, inner
-    );
-    writeln!(out, "}}");
-    begin_function_definition(out);
     writeln!(
         out,
         "void cxxbridge1$shared_ptr${}$clone(::std::shared_ptr<{}> const &self, ::std::shared_ptr<{}> *ptr) noexcept {{",