[cpu]: remove unused field Stolen

see #676

cpu/cpu.go

@@ -27,7 +27,6 @@ type TimesStat struct {
 	Steal     float64 `json:"steal"`
 	Guest     float64 `json:"guest"`
 	GuestNice float64 `json:"guestNice"`
-	Stolen    float64 `json:"stolen"`
 }
 
 type InfoStat struct {
@@ -80,7 +79,6 @@ func (c TimesStat) String() string {
 		`"steal":` + strconv.FormatFloat(c.Steal, 'f', 1, 64),
 		`"guest":` + strconv.FormatFloat(c.Guest, 'f', 1, 64),
 		`"guestNice":` + strconv.FormatFloat(c.GuestNice, 'f', 1, 64),
-		`"stolen":` + strconv.FormatFloat(c.Stolen, 'f', 1, 64),
 	}
 
 	return `{` + strings.Join(v, ",") + `}`
@@ -89,7 +87,7 @@ func (c TimesStat) String() string {
 // Total returns the total number of seconds in a CPUTimesStat
 func (c TimesStat) Total() float64 {
 	total := c.User + c.System + c.Nice + c.Iowait + c.Irq + c.Softirq + c.Steal +
-		c.Guest + c.GuestNice + c.Idle + c.Stolen
+		c.Guest + c.GuestNice + c.Idle
 	return total
 }
 
@@ -100,7 +98,7 @@ func (c InfoStat) String() string {
 
 func getAllBusy(t TimesStat) (float64, float64) {
 	busy := t.User + t.System + t.Nice + t.Iowait + t.Irq +
-		t.Softirq + t.Steal + t.Guest + t.GuestNice + t.Stolen
+		t.Softirq + t.Steal + t.Guest + t.GuestNice
 	return busy + t.Idle, busy
 }
 

cpu/cpu_test.go

@@ -71,7 +71,7 @@ func TestCPUTimeStat_String(t *testing.T) {
 		System: 200.1,
 		Idle:   300.1,
 	}
-	e := `{"cpu":"cpu0","user":100.1,"system":200.1,"idle":300.1,"nice":0.0,"iowait":0.0,"irq":0.0,"softirq":0.0,"steal":0.0,"guest":0.0,"guestNice":0.0,"stolen":0.0}`
+	e := `{"cpu":"cpu0","user":100.1,"system":200.1,"idle":300.1,"nice":0.0,"iowait":0.0,"irq":0.0,"softirq":0.0,"steal":0.0,"guest":0.0,"guestNice":0.0}`
 	if e != fmt.Sprintf("%v", v) {
 		t.Errorf("CPUTimesStat string is invalid: %v", v)
 	}