Update on "[PyTorch Mobile] Add an overload for deserialize() that do…

…esn't accept the extra_files map."

After the change to split `_load_for_mobile()` into multiple methods, one which takes in the `extra_files` map, and one which doesn't, we can change the implementation of the `deserialize()` method with different overloads as well. Suggested by @razy on D25968216.

#accept2ship

Differential Revision: [D26014084](https://our.internmc.facebook.com/intern/diff/D26014084/)

[ghstack-poisoned]

torch/csrc/jit/mobile/import.cpp

@@ -230,8 +230,7 @@ void parseMethods(
 class BytecodeDeserializer final {
  public:
   explicit BytecodeDeserializer(std::unique_ptr<PyTorchStreamReader> reader);
-  mobile::Module deserialize(
-      c10::optional<at::Device> device);
+  mobile::Module deserialize(c10::optional<at::Device> device);
   mobile::Module deserialize(
       c10::optional<at::Device> device,
       ExtraFilesMap& extra_files);
@@ -279,7 +278,8 @@ mobile::Module BytecodeDeserializer::deserialize(
   return deserialize(device);
 }
 
-mobile::Module BytecodeDeserializer::deserialize(c10::optional<at::Device> device) {
+mobile::Module BytecodeDeserializer::deserialize(
+    c10::optional<at::Device> device) {
   device_ = device;
   auto mcu = std::make_shared<mobile::CompilationUnit>();