fix: remove empty file with invalid Windows filename

[wahidrizka]

What

sources/|| is a tracked 0-byte blob (e69de29, the empty blob). | is one of the characters Windows forbids in filenames, so git clone and git checkout fail on native Windows:

error: invalid path 'sources/||'
fatal: unable to checkout working tree
warning: Clone succeeded, but checkout failed.

The working tree is left empty, so the repository cannot be used on Windows at all without a sparse-checkout workaround.

Closes #241.

Verification

Both clones run on the same Windows 11 machine, into a short target path so the 260-character limit is not a factor:

Source	Files checked out	Exit code
vercel/geist-font@main	1	128
this branch	5106	0

git status is clean on the second one, and sources/ still holds all nine real entries.

I removed the file through the GitHub contents API rather than locally, since it cannot be checked out on the machine that hits the bug.

One correction to the linked issue

#241 attributes the file to 30f2926 (Sep 2024). That is not where it came from: sources/ at that commit holds only five entries and none of them is ||. The API reports the file as added in 4e6dc3f, a config cleanup from April 2026. Either way it is empty and nothing references it.

Changeset

Not added. This touches only sources/, which is not part of the published geist package, so there is nothing to release.

[vercel]

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