Delete vendored code and update CI to Go 1.13 (#158)

As the Go community transitions to using the modules ecosystem,
we want to only support one way of managing dependencies.
So this change moves to only using Go modules for dependency management.

This means that our effective minimum Go version increases to Go 1.11.
To account for this, we also update:
  - the documentation
  - Makefile
  - CI scripts

1 files changed, 0 insertions, 60 deletions

diff --git a/vendor/golang.org/x/crypto/argon2/blamka_amd64.go b/vendor/golang.org/x/crypto/argon2/blamka_amd64.go
deleted file mode 100644
index 2fc1ec0..0000000
--- a/vendor/golang.org/x/crypto/argon2/blamka_amd64.go
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2017 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 amd64,!gccgo,!appengine
-
-package argon2
-
-import "golang.org/x/sys/cpu"
-
-func init() {
-	useSSE4 = cpu.X86.HasSSE41
-}
-
-//go:noescape
-func mixBlocksSSE2(out, a, b, c *block)
-
-//go:noescape
-func xorBlocksSSE2(out, a, b, c *block)
-
-//go:noescape
-func blamkaSSE4(b *block)
-
-func processBlockSSE(out, in1, in2 *block, xor bool) {
-	var t block
-	mixBlocksSSE2(&t, in1, in2, &t)
-	if useSSE4 {
-		blamkaSSE4(&t)
-	} else {
-		for i := 0; i < blockLength; i += 16 {
-			blamkaGeneric(
-				&t[i+0], &t[i+1], &t[i+2], &t[i+3],
-				&t[i+4], &t[i+5], &t[i+6], &t[i+7],
-				&t[i+8], &t[i+9], &t[i+10], &t[i+11],
-				&t[i+12], &t[i+13], &t[i+14], &t[i+15],
-			)
-		}
-		for i := 0; i < blockLength/8; i += 2 {
-			blamkaGeneric(
-				&t[i], &t[i+1], &t[16+i], &t[16+i+1],
-				&t[32+i], &t[32+i+1], &t[48+i], &t[48+i+1],
-				&t[64+i], &t[64+i+1], &t[80+i], &t[80+i+1],
-				&t[96+i], &t[96+i+1], &t[112+i], &t[112+i+1],
-			)
-		}
-	}
-	if xor {
-		xorBlocksSSE2(out, in1, in2, &t)
-	} else {
-		mixBlocksSSE2(out, in1, in2, &t)
-	}
-}
-
-func processBlock(out, in1, in2 *block) {
-	processBlockSSE(out, in1, in2, false)
-}
-
-func processBlockXOR(out, in1, in2 *block) {
-	processBlockSSE(out, in1, in2, true)
-}