runtime: remove redundant expression from SetFinalizer

The previous if condition already checks the same expression and doesn't
have side effects.

Change-Id: Ieaf30a786572b608d0a883052b45fd3f04bc6147
Reviewed-on: https://go-review.googlesource.com/28475Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/runtime/mfinal.go

@@ -352,7 +352,7 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 	if ft.dotdotdot() {
 		throw("runtime.SetFinalizer: cannot pass " + etyp.string() + " to finalizer " + ftyp.string() + " because dotdotdot")
 	}
-	if ft.dotdotdot() || ft.inCount != 1 {
+	if ft.inCount != 1 {
 		throw("runtime.SetFinalizer: cannot pass " + etyp.string() + " to finalizer " + ftyp.string())
 	}
 	fint := ft.in()[0]