docs(README.md): remove unused import in "Using Builder Pattern" example
@@ -250,7 +250,7 @@ The next example shows a far less verbose method, but sacrifices some of the adv
//
// This example demonstrates clap's "usage strings" method of creating arguments
// which is less verbose
-use clap::{Arg, App};
+use clap::App;
fn main() {
let matches = App::new("myapp")
