remove an obsolete file that should've gone with r77252

Modules/hashlib.h

-/* Common code for use by all hashlib related modules. */
-
-/*
- * Given a PyObject* obj, fill in the Py_buffer* viewp with the result
- * of PyObject_GetBuffer.  Sets and exception and issues a returns
- * on any errors.
- */
-#define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp, error_return) do { \
-        if (PyUnicode_Check((obj))) { \
-            PyErr_SetString(PyExc_TypeError, \
-                            "Unicode-objects must be encoded before hashing");\
-            return error_return; \
-        } \
-        if (!PyObject_CheckBuffer((obj))) { \
-            PyErr_SetString(PyExc_TypeError, \
-                            "object supporting the buffer API required"); \
-            return error_return; \
-        } \
-        if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \
-            return error_return; \
-        } \
-        if ((viewp)->ndim > 1) { \
-            PyErr_SetString(PyExc_BufferError, \
-                            "Buffer must be single dimension"); \
-            PyBuffer_Release((viewp)); \
-            return error_return; \
-        } \
-    } while(0);