remove deprecated style variable

[ain-soph]

style variable is deprecated in sphinx 7.0.0. However, in current pytorch_sphinx_theme, we are still using it.

pytorch_sphinx_theme/pytorch_sphinx_theme/layout.html

Lines 43 to 45 in a1dbd5c

	<link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
	<!-- <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" /> -->

Following is the solution from sphinx-rtd-theme:
https://github.com/readthedocs/sphinx_rtd_theme/blob/03a86b803cf7cf281748ef94345ba7c35953952a/sphinx_rtd_theme/layout.html#L26-L30

They add an if condition for compatibility with very old sphinx<4.0. I think we can just remove those codes.

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https://www.sphinx-doc.org/en/master/changes.html

[svekars]

Sorry for the late response. I know this is a valid issue. Did you have a chance to test this against Sphinx version 5.0 and older? A lot of pytorch sites still use the older version.

[ain-soph]

@svekars Sorry that I don't have time to test it recently. If it's not in a hurry, I may test that during Christmas.