remove deprecated example

examples/capture.rs

-use clap::Parser;
-
-fn capture(b: &plnk::Bencher) {
-    let outer = 10;
-    plnk::bench(b, "dummy", || {
-        let inner = outer;
-        plnk::timeit(|| inner + outer)
-    });
-}
-
-#[derive(Parser, Debug)]
-struct Args {
-    #[arg(short, long, default_value_t = 10)]
-    nb_measurements: usize,
-}
-
-fn main() {
-    let args = Args::parse();
-
-    let bencher = plnk::Bencher::new(args.nb_measurements);
-
-    capture(&bencher.with_name("capture"));
-}