Remove Saturation() from rate limiter interface

Kubernetes-commit: a9ed90f227f07fab2da75541d57a5366ddb38f66

util/flowcontrol/throttle_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package flowcontrol
 
 import (
-	"math"
 	"sync"
 	"testing"
 	"time"
@@ -116,29 +115,6 @@ func TestThrottle(t *testing.T) {
 	}
 }
 
-func TestRateLimiterSaturation(t *testing.T) {
-	const e = 0.000001
-	tests := []struct {
-		capacity int
-		take     int
-
-		expectedSaturation float64
-	}{
-		{1, 1, 1},
-		{10, 3, 0.3},
-	}
-	for i, tt := range tests {
-		rl := NewTokenBucketRateLimiter(1, tt.capacity)
-		for i := 0; i < tt.take; i++ {
-			rl.Accept()
-		}
-		if math.Abs(rl.Saturation()-tt.expectedSaturation) > e {
-			t.Fatalf("#%d: Saturation rate difference isn't within tolerable range\n want=%f, get=%f",
-				i, tt.expectedSaturation, rl.Saturation())
-		}
-	}
-}
-
 func TestAlwaysFake(t *testing.T) {
 	rl := NewFakeAlwaysRateLimiter()
 	if !rl.TryAccept() {