zig: Remove `folds.scm` (#9975)

This PR removes the `folds.scm` file from the `zig` extension, as Zed
doesn't make use of it.

Release Notes:

- N/A
79b3b0c8ffMarshall Bowers committed on 3/29/2024, 10:07:44 PM· committed by GitHubparentb0fb02e
1 file changedLine totals unavailable