cmd/guru: fix vet error in referrers.go

Fixes golang/go#25227

Change-Id: If121154f95681367874332dac30bfe69d1755182
Reviewed-on: https://go-review.googlesource.com/111035
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/cmd/guru/referrers.go b/cmd/guru/referrers.go
index 215f803..d079e27 100644
--- a/cmd/guru/referrers.go
+++ b/cmd/guru/referrers.go
@@ -265,9 +265,8 @@
 	// to completion.
 
 	var (
-		mu    sync.Mutex
-		qobj  types.Object
-		qinfo *loader.PackageInfo // info for qpkg
+		mu   sync.Mutex
+		qobj types.Object
 	)
 
 	// For efficiency, we scan each package for references
@@ -291,9 +290,6 @@
 					log.Fatalf("object at %s not found in package %s",
 						objposn, defpkg)
 				}
-
-				// Object found.
-				qinfo = info
 			}
 			obj := qobj
 			mu.Unlock()