Trim resources

[vidartf]

With all the current assets, the wheel ends up at 17MB. We should probably trim this by using the same logic as for notebook:

jupyter_server_mathjax/copyAssets.js

Lines 23 to 56 in df11442

	// TODO: Trim to same resources as notebook?
	/*
	# Trim mathjax
	mj = lambda *path: pjoin(components, 'MathJax', *path)
	static_data.extend([
	mj('MathJax.js'),
	mj('config', 'TeX-AMS-MML_HTMLorMML-full.js'),
	mj('config', 'Safe.js'),
	])
	trees = []
	mj_out = mj('jax', 'output')
	if os.path.exists(mj_out):
	for output in os.listdir(mj_out):
	path = pjoin(mj_out, output)
	static_data.append(pjoin(path, '*.js'))
	autoload = pjoin(path, 'autoload')
	if os.path.isdir(autoload):
	trees.append(autoload)
	for tree in trees + [
	mj('localization'), # limit to en?
	mj('fonts', 'HTML-CSS', 'STIX-Web', 'woff'),
	mj('extensions'),
	mj('jax', 'input', 'TeX'),
	mj('jax', 'output', 'HTML-CSS', 'fonts', 'STIX-Web'),
	mj('jax', 'output', 'SVG', 'fonts', 'STIX-Web'),
	mj('jax', 'element', 'mml'),
	]:
	for parent, dirs, files in os.walk(tree):
	for f in files:
	static_data.append(pjoin(parent, f))
	*/