Delete unnessesary code from dict.clear

Author: janczer

vm/src/obj/objdict.rs

@@ -246,14 +246,8 @@ fn dict_delitem(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
 
 fn dict_clear(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
     arg_check!(vm, args, required = [(dict, Some(vm.ctx.dict_type()))]);
-    let mut mut_obj = dict.borrow_mut();
-    match mut_obj.payload {
-        PyObjectPayload::Dict { ref mut elements } => {
-            elements.clear();
-            Ok(vm.get_none())
-        }
-        _ => Err(vm.new_type_error("".to_string())),
-    }
+    get_mut_elements(dict).clear();
+    Ok(vm.get_none())
 }
 
 /// When iterating over a dictionary, we iterate over the keys of it.