[llvm] Remove the assertion to unblock breakages (PR #88035)

[Alexander Yermolovich via llvm-commits]

ayermolo wrote:

> > > OK, so this is because there is no profile loaded for this function in pre-link time (so it never run this profileIsValid), the attr is not set(unknown).
> > 
> > 
> > I'm curious why does this happen?
> 
> This can happen when meet:
> 
> 1. there is no outline/top-level function in the profile( the function is all inlined into its caller or pre-inliner all inlines them).
> 2. because we use flattened profile. In prelink, all the internal function's nested(children) profile doesn't have this function.
> 3. In post-link, one (external) function 's nested profile have this function.
> 
> basically this is caused by the profile flattening.

What should happen in that case?
Is the test warranted?

https://github.com/llvm/llvm-project/pull/88035