remove unused function

src/cli.rs

@@ -1,4 +1,4 @@
-use clap::{App, Arg, ArgGroup, ArgMatches};
+use clap::{App, Arg, ArgGroup};
 
 pub fn build_cli() -> App<'static, 'static> {
     App::new("lamp")
@@ -78,9 +78,3 @@ log: uses percentage values (0.0 - 1.0) with a logarithmic curve for the actual
                 ),
         )
 }
-
-/// Creates a argument parser with [clap](../clap/index.html) and returns a `Box` with the
-/// [matches](../clap/struct.ArgMatches.html).
-pub fn parse_args<'a>() -> Box<ArgMatches<'a>> {
-    Box::new(build_cli().get_matches())
-}