all: eliminate vet diagnostics

For golang/go#74011

Change-Id: Ia2934d5a78be6a5ce38bb5b39b458b34077575b8
Reviewed-on: https://go-review.googlesource.com/c/debug/+/714222
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

internal/core/process.go

diff --git a/internal/core/process.go b/internal/core/process.go
index ad19ad0..c21ffb2 100644
--- a/internal/core/process.go
+++ b/internal/core/process.go
@@ -538,7 +538,6 @@
 			return Address(val)
 		}
 	}
-	return 0
 }
 
 func readFileMappings(meta metadata, notes noteMap) []namedMapping {