[llvm] [gsymutil] Fix build error in 196448 and remove warning message (PR #197028)

[Kewen Meng via llvm-commits]

Kewen12 wrote:

> @Kewen12 I'm basically waiting for the checks to pass. Do you want me to check "Merge without waiting for requirements to be met (bypass rules)" and directly merge? The checks takes about an hour I think.

Let's wait for CI. We could enable auto-merge so it will land after CI passes.

https://github.com/llvm/llvm-project/pull/197028