[libc-commits] [libc] Revert "[libc] Breakup freelist_malloc into separate files" (PR #119749)

[Petr Hosek via libc-commits]

petrhosek wrote:

> ```
> /usr/bin/ld: projects/libc/fuzzing/__support/libc.fuzzing.__support.freelist_heap_fuzz: hidden symbol `__llvm_libc_heap_limit' isn't defined
> ```

I'm trying to reproduce the issue locally and hopefully we'll be able to reland this soon but I don't want to keep the builders broken in the meantime.

https://github.com/llvm/llvm-project/pull/119749