cmd/compile: get rid of unused Name.Method field

It's never set anywhere, and even if it was, it would just Fatalf.

Change-Id: I84ade6d2068c623a8c85f84d8cdce38984996ddd
Reviewed-on: https://go-review.googlesource.com/32489
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/gsubr.go

@@ -136,9 +136,6 @@ func Naddr(a *obj.Addr, n *Node) {
 	if s == nil {
 		Fatalf("naddr: nil sym %v", n)
 	}
-	if n.Name.Method && n.Type != nil && n.Type.Sym != nil && n.Type.Sym.Pkg != nil {
-		Fatalf("naddr: weird method %v", n)
-	}
 
 	a.Type = obj.TYPE_MEM
 	switch n.Class {

src/cmd/compile/internal/gc/syntax.go

@@ -191,7 +191,6 @@ type Name struct {
 	Decldepth int32  // declaration loop depth, increased for every loop or label
 	Vargen    int32  // unique name for ONAME within a function.  Function outputs are numbered starting at one.
 	Funcdepth int32
-	Method    bool // OCALLMETH name
 	Readonly  bool
 	Captured  bool // is the variable captured by a closure
 	Byval     bool // is the variable captured by value or by reference