That code has been replaced with a “TODO” message, which indicates that Google might be working on a replacement. The developer who made the change works on the Starnix project, which has been designed to enable Fuchsia to run apps and libraries that were originally built for Android or Linux natively. This is similar to how Apple M-series-powered Macs run Intel-based apps using the dynamic binary translator Rosetta 2.
As we expand the universe of software we wish to run on Fuchsia, we are encountering software that we wish to run on Fuchsia that we do not have the ability to recompile. For example, Android applications contain native code modules that have been compiled for Linux. In order to run this software on Fuchsia, we need to be able to run binaries without modifying them.