remove header example

Author: saviorand

client.mojo

@@ -5,7 +5,7 @@ from lightbug_http.sys.client import MojoClient
 
 fn test_request(inout client: MojoClient) raises -> None:
     var uri = URI("http://httpbin.org/status/404")
-    var request = HTTPRequest(uri, RequestHeader())
+    var request = HTTPRequest(uri)
     var response = client.do(request)
 
     # print status code