Suggestion to anonymise trait imports that are not used directly

[bayov]

What it does

Changes trait imports that are not directly used to be anonymous.

Advantage

• Removes unused identifiers from scope.
• Clearly marks the intent of imports; seeing use std::fmt::Write as _ is an indicator that Write is only being used so that its trait methods are in scope, and not referred to directly.
• Lowers chance of conflicts with similarly named traits.

Drawbacks

No response

Example

fn foo() {
    use std::fmt::Write;
    let mut s = String::new();
    s.write_char('x');
}

Could be written as:

fn foo() {
    use std::fmt::Write as _; // anonymous
    let mut s = String::new();
    s.write_char('x');
}

[jrose-signal]

Same as #11969 ?

[bayov]

Yep, this is a duplicate it seems,