[Cython] Remove "parsetuple_format" from PyrexTypes?

[Stefan Behnel]

Hi,

I just fixed an unused variable problem when using (Py_s)size_t as function
argument types (fix can wait for 0.11.1). Doing this, I noticed that the
type indication character that each type stores in "parsetuple_format" is
no longer used anywhere since PyArg_ParseTupleAndKeywords() was replaced by
our own code. Before I rip this attribute straight out, can anyone still
see a use case for this? Maybe in combination with buffer content types?

Stefan