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, 32 deletions

diff --git a/vendor/golang.org/x/sys/unix/fcntl.go b/vendor/golang.org/x/sys/unix/fcntl.go
deleted file mode 100644
index 9379ba9..0000000
--- a/vendor/golang.org/x/sys/unix/fcntl.go
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2014 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 darwin dragonfly freebsd linux netbsd openbsd
-
-package unix
-
-import "unsafe"
-
-// fcntl64Syscall is usually SYS_FCNTL, but is overridden on 32-bit Linux
-// systems by flock_linux_32bit.go to be SYS_FCNTL64.
-var fcntl64Syscall uintptr = SYS_FCNTL
-
-// FcntlInt performs a fcntl syscall on fd with the provided command and argument.
-func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
-	valptr, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(arg))
-	var err error
-	if errno != 0 {
-		err = errno
-	}
-	return int(valptr), err
-}
-
-// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
-func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
-	_, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk)))
-	if errno == 0 {
-		return nil
-	}
-	return errno
-}