fixup! add tests for export to make sure throttling works correctly

internal/controller/mantlebackup_controller_test.go

@@ -1330,16 +1330,6 @@ var _ = Describe("export", func() {
 		// create 5 different MantleBackup resources and call export() for each of them
 		for i := 0; i < 5; i++ {
 			createAndExportMantleBackup(mbr, fmt.Sprintf("target1-%d", i), ns)
-			if i == 0 {
-				// wait for at least one Job is created so that k8sClient's cache
-				// will be up-to-date and export() can correctly make a decision.
-				Eventually(ctx, func(g Gomega) error {
-					numJobs, err := getNumOfExportJobs(nsController)
-					g.Expect(err).NotTo(HaveOccurred())
-					g.Expect(numJobs).To(Equal(1))
-					return nil
-				}).Should(Succeed())
-			}
 		}
 
 		// make sure that only 1 Job is created