Fix wrong CPU count after CPU hot-plugging on Windows

This fix tries to fix wrong CPU count after CPU hot-plugging.
On windows, GetProcessAffinityMask has been used to probe the
number of CPUs in real time.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 3707a76921b412cb42e6134beaa0bddbb5e08f25
Component: engine

components/engine/pkg/sysinfo/numcpu_linux.go

@@ -10,16 +10,6 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-// Returns bit count of 1
-func popcnt(x uint64) (n byte) {
-	x -= (x >> 1) & 0x5555555555555555
-	x = (x>>2)&0x3333333333333333 + x&0x3333333333333333
-	x += x >> 4
-	x &= 0x0f0f0f0f0f0f0f0f
-	x *= 0x0101010101010101
-	return byte(x >> 56)
-}
-
 // numCPU queries the system for the count of threads available
 // for use to this process.
 //