chore: remove useless tuple param

src/main.rs

@@ -260,7 +260,7 @@ fn main() -> Result<()> {
                     ctx.add_signer(&key)
                         .context("could not add signer")
                         .unwrap(); // FIXME
-                    Some((ctx, key))
+                    Some(ctx)
                 }
                 None => None,
             };
@@ -307,7 +307,7 @@ fn main() -> Result<()> {
 
                 let mut header = header_lines.join("\n");
 
-                if let Some((ctx, _)) = &mut gpg {
+                if let Some(ctx) = &mut gpg {
                     let to_sign = format!("{header}\n{message}");
                     let mut output = Vec::new();
                     ctx.sign(SignMode::Detached, to_sign, &mut output)