GOMAXPROCS use defaults to the value of runtime.NumCPU

https://github.com/chrislusf/seaweedfs/issues/1942

weed/command/volume.go

@@ -6,7 +6,6 @@ import (
 	"net/http"
 	httppprof "net/http/pprof"
 	"os"
-	"runtime"
 	"runtime/pprof"
 	"strconv"
 	"strings"
@@ -111,8 +110,6 @@ func runVolume(cmd *Command, args []string) bool {
 
 	util.LoadConfiguration("security", false)
 
-	runtime.GOMAXPROCS(runtime.NumCPU())
-
 	// If --pprof is set we assume the caller wants to be able to collect
 	// cpu and memory profiles via go tool pprof
 	if !*v.pprof {