[llvm] fix TracePCGuard default false positive (PR #106464)

[Andrew Kelley via llvm-commits]

andrewrk wrote:

I give up, but for the record this code should be deleted:

```
if (!Options.TracePCGuard && !Options.TracePC &&
      !Options.Inline8bitCounters && !Options.StackDepth &&
      !Options.InlineBoolFlag && !Options.TraceLoads && !Options.TraceStores &&
      !Options.TraceCmp && !Options.TraceDiv && !Options.TraceGep)
    Options.TracePCGuard = true; // TracePCGuard is default.
```



https://github.com/llvm/llvm-project/pull/106464