Removed rtFailureProbability variable (#3038)

This variable is actually is not being used during sending requests
to the test proxy, but left in the assert statement.
The test were working before, because the result of multiplication
is close enough to zero.

Signed-off-by: Roman Zavodskikh <roman.zavodskikh@zalando.de>
Co-authored-by: Roman Zavodskikh <roman.zavodskikh@zalando.de>

proxy/healthy_endpoints_test.go

@@ -13,9 +13,8 @@ import (
 )
 
 const (
-	nRequests            = 15_000
-	rtFailureProbability = 0.8
-	period               = 100 * time.Millisecond
+	nRequests = 15_000
+	period    = 100 * time.Millisecond
 )
 
 func defaultEndpointRegistry() *routing.EndpointRegistry {
@@ -178,7 +177,7 @@ func TestPHCForMultipleHealthyAndOneUnhealthyEndpoints(t *testing.T) {
 			defer tp.close()
 			defer ps.Close()
 			failedReqs := sendGetRequests(t, ps)
-			assert.InDelta(t, 0.33*rtFailureProbability*(1.0-rtFailureProbability)*float64(nRequests), failedReqs, 0.1*float64(nRequests))
+			assert.InDelta(t, 0, failedReqs, 0.1*float64(nRequests))
 		})
 	}
 
@@ -188,6 +187,6 @@ func TestPHCForMultipleHealthyAndOneUnhealthyEndpoints(t *testing.T) {
 		defer tp.close()
 		defer ps.Close()
 		failedReqs := sendGetRequests(t, ps)
-		assert.InDelta(t, 0.33*rtFailureProbability*(1.0-rtFailureProbability)*float64(nRequests), failedReqs, 0.1*float64(nRequests))
+		assert.InDelta(t, 0, failedReqs, 0.1*float64(nRequests))
 	})
 }