Revert "Backport METH_FASTCALL from Python 3.7 (#328)"

This reverts commit cf73bbd678.

third_party/python/Include/eval.h

@@ -15,16 +15,6 @@ PyObject * PyEval_EvalCodeEx(PyObject *co,
 					PyObject *kwdefs, PyObject *closure);
 
 #ifndef Py_LIMITED_API
-PyObject * _PyEval_EvalCodeWithName(
-    PyObject *co,
-    PyObject *globals, PyObject *locals,
-    PyObject **args, Py_ssize_t argcount,
-    PyObject **kwnames, PyObject **kwargs,
-    Py_ssize_t kwcount, int kwstep,
-    PyObject **defs, Py_ssize_t defcount,
-    PyObject *kwdefs, PyObject *closure,
-    PyObject *name, PyObject *qualname);
-
 PyObject * _PyEval_CallTracing(PyObject *func, PyObject *args);
 #endif