[llvm] [ProfileData] Drop an unused parameter from addValueData (PR #96233)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

> Perhaps add an assertion check that ValueSites.size() == Site + 1 ?

OK.  I've added an assertion `ValueSites.size() == Site` before adding a value.

Please take a look.  Thanks!

https://github.com/llvm/llvm-project/pull/96233