remove unneeded let bindings of unit value in parser

Author: lqd

crates/formality-macros/src/parse.rs

@@ -188,22 +188,22 @@ fn parse_variant_with_attr(
             spec::FormalitySpecSymbol::Keyword { ident } => {
                 let literal = as_literal(ident);
                 quote_spanned!(ident.span() =>
-                    let () = __p.expect_keyword(#literal)?;
+                    __p.expect_keyword(#literal)?;
                 )
             }
 
             spec::FormalitySpecSymbol::Char { punct } => {
                 let literal = Literal::character(punct.as_char());
                 quote_spanned!(
                     punct.span() =>
-                    let () = __p.expect_char(#literal)?;
+                    __p.expect_char(#literal)?;
                 )
             }
 
             spec::FormalitySpecSymbol::Delimeter { text } => {
                 let literal = Literal::character(*text);
                 quote!(
-                    let () = __p.expect_char(#literal)?;
+                    __p.expect_char(#literal)?;
                 )
             }
         });