Changes made on October 16 break build on Ubuntu 24.04

[farhaven]

The changes made on October 16 by generatedunixname89002005279527 remove a bunch of third party files, but leave the infrastructure that tries to build them in place (in particular vlfeat and gtest). This breaks the configuration step (and thus the build) on Ubuntu 24.04.

What is the best way to work around this? As of now, I'm building an older checkout, but this seems to be an issue that should be fixed?