remove superfluous lifetimes and returns

src/parse/function.rs

@@ -18,7 +18,7 @@ use super::{NeverEmptyVec, Parser, Stmt};
 const FORBIDDEN_IDENTIFIERS: [&str; 7] =
     ["calc", "element", "expression", "url", "and", "or", "not"];
 
-fn unvendor<'a>(name: &'a str) -> &'a str {
+fn unvendor(name: &str) -> &str {
     let mut chars = name.chars();
     if !matches!(chars.next(), Some('-')) {
         return name;

src/selector/extend/mod.rs

@@ -166,7 +166,7 @@ impl Extender {
                 if complex.components.len() == 1 {
                     Ok(complex.components.first().unwrap().as_compound().clone())
                 } else {
-                    return Err(("Can't extend complex selector $complex.", span).into());
+                    Err(("Can't extend complex selector $complex.", span).into())
                 }
             })
             .collect::<SassResult<Vec<CompoundSelector>>>()?;