Remove superseded handle::operator() overloads

The variadic handle::operator() offers the same functionality as well
as mixed positional, keyword, * and ** arguments. The tests are also
superseded by the ones in `test_callbacks`.

include/pybind11/cast.h

@@ -1134,20 +1134,6 @@ template <return_value_policy policy,
     return operator()<policy>(std::forward<Args>(args)...);
 }
 
-inline object handle::operator()(detail::args_proxy args) const {
-    object result(PyObject_CallObject(m_ptr, args.ptr()), false);
-    if (!result)
-        throw error_already_set();
-    return result;
-}
-
-inline object handle::operator()(detail::args_proxy args, detail::kwargs_proxy kwargs) const {
-    object result(PyObject_Call(m_ptr, args.ptr(), kwargs.ptr()), false);
-    if (!result)
-        throw error_already_set();
-    return result;
-}
-
 template <typename... Args, typename /*SFINAE*/>
 dict::dict(Args &&...args)
     : dict(detail::unpacking_collector<>(std::forward<Args>(args)...).kwargs()) { }

include/pybind11/pytypes.h

@@ -48,8 +48,6 @@ public:
     object call(Args&&... args) const;
     template <return_value_policy policy = return_value_policy::automatic_reference, typename ... Args>
     object operator()(Args&&... args) const;
-    inline object operator()(detail::args_proxy args) const;
-    inline object operator()(detail::args_proxy f_args, detail::kwargs_proxy kwargs) const;
     operator bool() const { return m_ptr != nullptr; }
     bool operator==(const handle &h) const { return m_ptr == h.m_ptr; }
     bool operator!=(const handle &h) const { return m_ptr != h.m_ptr; }

tests/test_kwargs_and_defaults.cpp

@@ -20,13 +20,6 @@ std::string kw_func4(const std::vector<int> &entries) {
     return ret;
 }
 
-py::object call_kw_func(py::function f) {
-    py::tuple args = py::make_tuple(1234);
-    py::dict kwargs;
-    kwargs["y"] = py::cast(5678);
-    return f(*args, **kwargs);
-}
-
 py::tuple args_function(py::args args) {
     return args;
 }
@@ -49,9 +42,7 @@ test_initializer arg_keywords_and_defaults([](py::module &m) {
     std::vector<int> list;
     list.push_back(13);
     list.push_back(17);
-
     m.def("kw_func4", &kw_func4, py::arg("myList") = list);
-    m.def("call_kw_func", &call_kw_func);
 
     m.def("args_function", &args_function);
     m.def("args_kwargs_function", &args_kwargs_function);

tests/test_kwargs_and_defaults.py

 import pytest
-from pybind11_tests import (kw_func0, kw_func1, kw_func2, kw_func3, kw_func4, call_kw_func,
-                            args_function, args_kwargs_function, kw_func_udl, kw_func_udl_z,
-                            KWClass)
+from pybind11_tests import (kw_func0, kw_func1, kw_func2, kw_func3, kw_func4, args_function,
+                            args_kwargs_function, kw_func_udl, kw_func_udl_z, KWClass)
 
 
 def test_function_signatures(doc):
@@ -49,8 +48,6 @@ def test_named_arguments(msg):
 
 
 def test_arg_and_kwargs():
-    assert call_kw_func(kw_func2) == "x=1234, y=5678"
-
     args = 'arg1_value', 'arg2_value', 3
     assert args_function(*args) == args