Remove test reference images from repository

[TimeTravelPenguin]

Is there an existing issue outlining your problem?

• I have searched the existing issues and they do not solve my problem.

Describe your issue.

Since typst-test performs unit tests by comparing test outputs against reference images, these references must be stored and therefore take up space in the repository.

As it stands, there is no workaround for this as of writing, but it seems that there is interest in this tingerrr/typst-test#15

In the meantime, it might be worth investigating ways to temporarily solve this, if it is really that important. The main difficulty, however, is that typst-test compares against the reference images, so doing something such as storing an SQLite database of test reference image hashes isn't possible.

At the very least, this issue can remain until there is a built-in solution, at which point the images can then be removed.