all: move internal/x to vendor/golang.org/x and revendor using 'go mod vendor'

This also updates the vendored-in versions of several packages: 'go
mod vendor' selects a consistent version of each module, but we had
previously vendored an ad-hoc selection of packages.

Notably, x/crypto/hkdf was previously vendored in at a much newer
commit than the rest of x/crypto. Bringing the rest of x/crypto up to
that commit introduced an import of golang.org/x/sys/cpu, which broke
the js/wasm build, requiring an upgrade of x/sys to pick up CL 165749.

Updates #30228
Updates #30241
Updates #25822

Change-Id: I5b3dbc232b7e6a048a158cbd8d36137af1efb711
Reviewed-on: https://go-review.googlesource.com/c/go/+/164623
Reviewed-by: Filippo Valsorda <filippo@golang.org>

1 files changed, 0 insertions, 29 deletions

diff --git a/src/internal/x/text/unicode/norm/example_test.go b/src/internal/x/text/unicode/norm/example_test.go
deleted file mode 100644
index a9904400df..0000000000
--- a/src/internal/x/text/unicode/norm/example_test.go
+++ /dev/null
@@ -1,29 +0,0 @@
-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
-
-// Copyright 2016 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.
-
-package norm_test
-
-import (
-	"fmt"
-
-	"internal/x/text/unicode/norm"
-)
-
-func ExampleForm_NextBoundary() {
-	s := norm.NFD.String("Mêlée")
-
-	for i := 0; i < len(s); {
-		d := norm.NFC.NextBoundaryInString(s[i:], true)
-		fmt.Printf("%[1]s: %+[1]q\n", s[i:i+d])
-		i += d
-	}
-	// Output:
-	// M: "M"
-	// ê: "e\u0302"
-	// l: "l"
-	// é: "e\u0301"
-	// e: "e"
-}