util/sysresources: remove unused package (#19523)

Added a few years ago and appears to be unused.

Updates #cleanup

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>

util/sysresources/memory.go

@@ -1,10 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-package sysresources
-
-// TotalMemory returns the total accessible system memory, in bytes. If the
-// value cannot be determined, then 0 will be returned.
-func TotalMemory() uint64 {
-	return totalMemoryImpl()
-}

util/sysresources/memory_bsd.go

@@ -1,16 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build freebsd || openbsd || dragonfly || netbsd
-
-package sysresources
-
-import "golang.org/x/sys/unix"
-
-func totalMemoryImpl() uint64 {
-	val, err := unix.SysctlUint64("hw.physmem")
-	if err != nil {
-		return 0
-	}
-	return val
-}

util/sysresources/memory_darwin.go

@@ -1,16 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build darwin
-
-package sysresources
-
-import "golang.org/x/sys/unix"
-
-func totalMemoryImpl() uint64 {
-	val, err := unix.SysctlUint64("hw.memsize")
-	if err != nil {
-		return 0
-	}
-	return val
-}

util/sysresources/memory_linux.go

@@ -1,19 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build linux
-
-package sysresources
-
-import "golang.org/x/sys/unix"
-
-func totalMemoryImpl() uint64 {
-	var info unix.Sysinfo_t
-
-	if err := unix.Sysinfo(&info); err != nil {
-		return 0
-	}
-
-	// uint64 casts are required since these might be uint32s
-	return uint64(info.Totalram) * uint64(info.Unit)
-}

util/sysresources/memory_unsupported.go

@@ -1,8 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build !(linux || darwin || freebsd || openbsd || dragonfly || netbsd)
-
-package sysresources
-
-func totalMemoryImpl() uint64 { return 0 }

util/sysresources/sysresources.go

@@ -1,6 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-// Package sysresources provides OS-independent methods of determining the
-// resources available to the current system.
-package sysresources

util/sysresources/sysresources_test.go

@@ -1,25 +0,0 @@
-// Copyright (c) Tailscale Inc & contributors
-// SPDX-License-Identifier: BSD-3-Clause
-
-package sysresources
-
-import (
-	"runtime"
-	"testing"
-)
-
-func TestTotalMemory(t *testing.T) {
-	switch runtime.GOOS {
-	case "linux":
-	case "freebsd", "openbsd", "dragonfly", "netbsd":
-	case "darwin":
-	default:
-		t.Skipf("not supported on runtime.GOOS=%q yet", runtime.GOOS)
-	}
-
-	mem := TotalMemory()
-	if mem == 0 {
-		t.Fatal("wanted TotalMemory > 0")
-	}
-	t.Logf("total memory: %v bytes", mem)
-}