Revert "Add partial_mut_args test"

This reverts commit 1c73c46af9.

tests/app_settings.rs

@@ -130,19 +130,6 @@ SUBCOMMANDS:
             
 ";
 
-static PARTIAL_MUT_ARGS: &str = "myprog 3.0
-
-USAGE:
-    myprog [OPTIONS]
-
-OPTIONS:
-        --first      first about
-    -h, --help       Print help information
-        --second     [env: ENV_REPLACED=]
-        --third      third arg
-    -V, --version    Print version information
-";
-
 #[test]
 fn setting() {
     let m = App::new("setting").setting(AppSettings::AllArgsOverrideSelf);
@@ -1249,26 +1236,3 @@ fn no_auto_version_mut_args() {
     assert!(result.is_ok());
     assert!(result.unwrap().is_present("version"));
 }
-
-#[test]
-fn partial_mut_args() {
-    let app = App::new("myprog")
-        .version("3.0")
-        .arg(
-            Arg::new("first").long("first").about("first arg"), // this about will be replaced
-        )
-        .arg(Arg::new("second").long("second").env("ENV_SECOND")) // this env will be replaced
-        .arg(Arg::new("third").long("third").about("third arg")) // this will not be mutated
-        .mut_args(|v| match v.get_name() {
-            "first" => Some(v.about("first about")),
-            "second" => Some(v.env("ENV_REPLACED")),
-            _ => None,
-        });
-
-    assert!(utils::compare_output(
-        app,
-        "myprog -h",
-        PARTIAL_MUT_ARGS,
-        false
-    ));
-}