[llvm] [Analysis][test] Remove unsafe-fp-math uses (NFC) (PR #164605)

[Nikita Popov via llvm-commits]

nikic wrote:

Just to clarify, I'm referring to removing the entire `attribute #N = {...}` sections from these tests. This avoids the need for more changes lateron when the other attributes get removed.

https://github.com/llvm/llvm-project/pull/164605