fix vendor directory

vendor/golang.org/x/text/width/gen_trieval.go

@@ -1,34 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-package main
-
-// elem is an entry of the width trie. The high byte is used to encode the type
-// of the rune. The low byte is used to store the index to a mapping entry in
-// the inverseData array.
-type elem uint16
-
-const (
-	tagNeutral elem = iota << typeShift
-	tagAmbiguous
-	tagWide
-	tagNarrow
-	tagFullwidth
-	tagHalfwidth
-)
-
-const (
-	numTypeBits = 3
-	typeShift   = 16 - numTypeBits
-
-	// tagNeedsFold is true for all fullwidth and halfwidth runes except for
-	// the Won sign U+20A9.
-	tagNeedsFold = 0x1000
-
-	// The Korean Won sign is halfwidth, but SHOULD NOT be mapped to a wide
-	// variant.
-	wonSign rune = 0x20A9
-)