Remove 🆖 comments (#7877)

Noticed several instances of commented out code that should just be
deleted. Also a comment on `eval_external` that was incorrect. All gone
now.

crates/nu-test-support/src/commands.rs

@@ -1,57 +1,3 @@
-// use nu_protocol::{
-//     ast::{Expr, Expression},
-//     Span, Spanned, Type,
-// };
-
-// pub struct ExternalBuilder {
-//     name: String,
-//     args: Vec<String>,
-// }
-
-// impl ExternalBuilder {
-//     pub fn for_name(name: &str) -> ExternalBuilder {
-//         ExternalBuilder {
-//             name: name.to_string(),
-//             args: vec![],
-//         }
-//     }
-
-//     pub fn arg(&mut self, value: &str) -> &mut Self {
-//         self.args.push(value.to_string());
-//         self
-//     }
-
-// pub fn build(&mut self) -> ExternalCommand {
-//     let mut path = crate::fs::binaries();
-//     path.push(&self.name);
-
-//     let name = Spanned {
-//         item: path.to_string_lossy().to_string(),
-//         span: Span::new(0, 0),
-//     };
-
-//     let args = self
-//         .args
-//         .iter()
-//         .map(|arg| Expression {
-//             expr: Expr::String(arg.to_string()),
-//             span: Span::new(0, 0),
-//             ty: Type::Unknown,
-//             custom_completion: None,
-//         })
-//         .collect::<Vec<_>>();
-
-//     ExternalCommand {
-//         name: name.to_string(),
-//         name_tag: Tag::unknown(),
-//         args: ExternalArgs {
-//             list: args,
-//             span: name.span,
-//         },
-//     }
-// }
-// }
-
 use std::{
     io::Read,
     process::{Command, Stdio},