remove duplicate header stuff in C module

sourmash_lib/_minhash.cc

@@ -1,69 +1,22 @@
-//
-// Python 2/3 compatibility: PyInt and PyLong
-//
-
-// Must be first.
-#include <Python.h>
-
-#if (PY_MAJOR_VERSION >= 3)
-#define PyInt_Check(arg) PyLong_Check(arg)
-#define PyInt_AsLong(arg) PyLong_AsLong(arg)
-#define PyInt_FromLong(arg) PyLong_FromLong(arg)
-#endif
-
-//
-// Python 2/3 compatibility: PyBytes and PyString
-// https://docs.python.org/2/howto/cporting.html#str-unicode-unification
-//
-
-#include "bytesobject.h"
-
-//
-// Python 2/3 compatibility: Module initialization
-// http://python3porting.com/cextensions.html#module-initialization
-//
-
-#if PY_MAJOR_VERSION >= 3
-#define MOD_ERROR_VAL NULL
-#define MOD_SUCCESS_VAL(val) val
-#define MOD_INIT(name) PyMODINIT_FUNC PyInit_##name(void)
-#define MOD_DEF(ob, name, doc, methods) \
-          static struct PyModuleDef moduledef = { \
-            PyModuleDef_HEAD_INIT, name, doc, -1, methods, }; \
-          ob = PyModule_Create(&moduledef);
-#else
-#define MOD_ERROR_VAL
-#define MOD_SUCCESS_VAL(val)
-#define MOD_INIT(name) void init##name(void)
-#define MOD_DEF(ob, name, doc, methods) \
-          ob = Py_InitModule3(name, methods, doc);
-#endif
-
-//
-// Function necessary for Python loading:
-//
-
-extern "C" {
-    MOD_INIT(_minhash);
-}
-
-
 #include <string>
 #include <set>
 #include <map>
 #include <exception>
 #include <iostream>
 
-#include "../third-party/smhasher/MurmurHash3.h"
-
 typedef unsigned long long HashIntoType;
 typedef std::set<HashIntoType> CMinHashType;
 uint64_t _hash_murmur(const std::string& kmer);
 
+#include "_minhash.hh"
+#include "../third-party/smhasher/MurmurHash3.h"
 
-////
 
-#include "_minhash.hh"
+extern "C" {
+    MOD_INIT(_minhash);
+}
+
+////
 
 static int _MinHash_len(PyObject *);
 static PyObject * _MinHash_concat_inplace(PyObject *, PyObject *);