[llvm] Revert "[llvm-cov][WebAssembly] Read `__llvm_prf_names` from data segments" (PR #112520)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo approved this pull request.

LGTM, this seems to fix my issues with llvm-cov.

https://github.com/llvm/llvm-project/pull/112520