Remove impossible add_stream overload

[cdce8p]

Remove overload which allowed codec_name and template to both have a value / have no value. The code requires that exactly one of the two has a value which is expressed by the other three overloads.

Leftover from #1610.

PyAV/av/container/output.pyx

Lines 46 to 62 in f8a07d0

	def add_stream(self, codec_name=None, object rate=None, Stream template=None, options=None, **kwargs):
	"""add_stream(codec_name, rate=None)
	Creates a new stream from a codec name or a template, and returns it.
	:param codec_name: The name of a codec.
	:type codec_name: str | Codec | None
	:param template: Copy codec from another :class:`~av.stream.Stream` instance.
	:type template: :class:`~av.stream.Stream` | None
	:param dict options: Stream options.
	:param \\**kwargs: Set attributes for the stream.
	:rtype: The new :class:`~av.stream.Stream`.
	"""
	if (codec_name is None and template is None) or (codec_name is not None and template is not None):
	raise ValueError("needs one of codec_name or template")

[WyattBlue]

I think #1615 solves this more completely.

[cdce8p]

I think #1615 solves this more completely.

Yes it does. Thanks!