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, 41 deletions

diff --git a/vendor/golang.org/x/sys/unix/zptracearm_linux.go b/vendor/golang.org/x/sys/unix/zptracearm_linux.go
deleted file mode 100644
index faf23bb..0000000
--- a/vendor/golang.org/x/sys/unix/zptracearm_linux.go
+++ /dev/null
@@ -1,41 +0,0 @@
-// Code generated by linux/mkall.go generatePtracePair(arm, arm64). DO NOT EDIT.
-
-// +build linux
-// +build arm arm64
-
-package unix
-
-import "unsafe"
-
-// PtraceRegsArm is the registers used by arm binaries.
-type PtraceRegsArm struct {
-	Uregs [18]uint32
-}
-
-// PtraceGetRegsArm fetches the registers used by arm binaries.
-func PtraceGetRegsArm(pid int, regsout *PtraceRegsArm) error {
-	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
-}
-
-// PtraceSetRegsArm sets the registers used by arm binaries.
-func PtraceSetRegsArm(pid int, regs *PtraceRegsArm) error {
-	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
-}
-
-// PtraceRegsArm64 is the registers used by arm64 binaries.
-type PtraceRegsArm64 struct {
-	Regs   [31]uint64
-	Sp     uint64
-	Pc     uint64
-	Pstate uint64
-}
-
-// PtraceGetRegsArm64 fetches the registers used by arm64 binaries.
-func PtraceGetRegsArm64(pid int, regsout *PtraceRegsArm64) error {
-	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
-}
-
-// PtraceSetRegsArm64 sets the registers used by arm64 binaries.
-func PtraceSetRegsArm64(pid int, regs *PtraceRegsArm64) error {
-	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
-}