Remove deprecated --host arg for search and publish cmds

Signed-off-by: hi-rustin <[email protected]>

Author: 0xPoe

src/cargo/util/command_prelude.rs

@@ -211,11 +211,6 @@ pub trait AppExt: Sized {
 
     fn arg_index(self) -> Self {
         self._arg(opt("index", "Registry index URL to upload the package to").value_name("INDEX"))
-            ._arg(
-                opt("host", "DEPRECATED, renamed to '--index'")
-                    .value_name("HOST")
-                    .hide(true),
-            )
     }
 
     fn arg_dry_run(self, dry_run: &'static str) -> Self {