Remove execution driver

We use containerd and there is no execution driver anymore.

Addresses: https://github.com/docker/docker/issues/24461

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>

api/client/system/info.go

@@ -58,7 +58,6 @@ func runInfo(dockerCli *client.DockerCli) error {
 			fmt.Fprintf(dockerCli.Out(), "%s: %s\n", pair[0], pair[1])
 		}
 	}
-	ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Execution Driver: %s\n", info.ExecutionDriver)
 	ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Logging Driver: %s\n", info.LoggingDriver)
 	ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Cgroup Driver: %s\n", info.CgroupDriver)
 

docs/reference/api/docker_remote_api_v1.25.md

@@ -2194,7 +2194,6 @@ Display system-wide information
         "DockerRootDir": "/var/lib/docker",
         "Driver": "btrfs",
         "DriverStatus": [[""]],
-        "ExecutionDriver": "native-0.1",
         "ExperimentalBuild": false,
         "HttpProxy": "http://test:test@localhost:8080",
         "HttpsProxy": "https://test:test@localhost:8080",

integration-cli/docker_api_info_test.go

@@ -22,7 +22,6 @@ func (s *DockerSuite) TestInfoApi(c *check.C) {
 		"ContainersPaused",
 		"ContainersStopped",
 		"Images",
-		"ExecutionDriver",
 		"LoggingDriver",
 		"OperatingSystem",
 		"NCPU",