Remove poll-breaking assertion in e2e test

Removed assertion of local-in-docker command result when running e2e tests in swarm.
This function is only used by the compatibility tests which does it's own assertion in a poll.
The removed assertion was breaking the poll flow stopping the test from being able to retry.

Signed-off-by: Nick Adcock <nick.adcock@docker.com>

e2e/helper_test.go

@@ -62,7 +62,6 @@ func runWithDindSwarmAndRegistry(t *testing.T, todo func(dindSwarmAndRegistryInf
 		}
 		cmd := icmd.Command(params[0], params[1:]...)
 		result := icmd.RunCmd(cmd)
-		result.Assert(t, icmd.Success)
 		return result.Combined()
 	}
 	// Func to execute docker cli commands