client: Rip out HTTP check from docker version

For background to this change please see:
https://github.com/dotcloud/docker/issues/4802
https://github.com/dotcloud/docker/pull/5670

Docker-DCO-1.1-Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com> (github: jmccrohan)
Upstream-commit: 3cec63d56f9de6332aa3f33502695283d4feb054
Component: engine

components/engine/integration-cli/docker_cli_version_test.go

@@ -26,7 +26,6 @@ func TestVersionEnsureSucceeds(t *testing.T) {
 		"Server API version:",
 		"Go version (server):",
 		"Git commit (server):",
-		"Last stable version:",
 	}
 
 	for _, linePrefix := range stringsToCheck {