chore: deal with clippy warnings

crates/lang/src/tipo/environment.rs

@@ -1093,6 +1093,7 @@ impl<'a> Environment<'a> {
     /// Any unbound type variables will be linked to the other type as they are the same.
     ///
     /// It two types are found to not be the same an error is returned.
+    #[allow(clippy::only_used_in_recursion)]
     pub fn unify(&mut self, t1: Arc<Type>, t2: Arc<Type>, location: Span) -> Result<(), Error> {
         if t1 == t2 {
             return Ok(());
@@ -1536,6 +1537,7 @@ fn get_compatible_record_fields<A>(
 
 /// Takes a level and a type and turns all type variables within the type that have
 /// level higher than the input level into generalized (polymorphic) type variables.
+#[allow(clippy::only_used_in_recursion)]
 pub(crate) fn generalise(t: Arc<Type>, ctx_level: usize) -> Arc<Type> {
     match t.deref() {
         Type::Var { tipo } => match tipo.borrow().deref() {

crates/lang/src/uplc.rs

@@ -649,7 +649,7 @@ impl<'a> CodeGenerator<'a> {
                                 let index =
                                     dt.constructors.iter().position(|c| name.clone() == c.name);
                                 data_type = dt.name.clone();
-                                current_module = module.clone().unwrap_or_else(|| "".to_string());
+                                current_module = module.clone().unwrap_or_default();
                                 total_constr_length = dt.constructors.len();
 
                                 index.unwrap_or(dt.constructors.len())

crates/uplc/src/debruijn.rs

@@ -214,6 +214,7 @@ impl Converter {
         Ok(converted_term)
     }
 
+    #[allow(clippy::only_used_in_recursion)]
     pub fn named_debruijn_to_debruijn(&mut self, term: &Term<NamedDeBruijn>) -> Term<DeBruijn> {
         match term {
             Term::Var(name) => Term::Var(name.clone().into()),
@@ -236,6 +237,7 @@ impl Converter {
         }
     }
 
+    #[allow(clippy::only_used_in_recursion)]
     pub fn debruijn_to_named_debruijn(&mut self, term: &Term<DeBruijn>) -> Term<NamedDeBruijn> {
         match term {
             Term::Var(name) => Term::Var((*name).into()),
@@ -258,6 +260,7 @@ impl Converter {
         }
     }
 
+    #[allow(clippy::only_used_in_recursion)]
     pub fn fake_named_debruijn_to_named_debruijn(
         &mut self,
         term: &Term<FakeNamedDeBruijn>,
@@ -287,6 +290,7 @@ impl Converter {
         }
     }
 
+    #[allow(clippy::only_used_in_recursion)]
     pub fn named_debruijn_to_fake_named_debruijn(
         &mut self,
         term: &Term<NamedDeBruijn>,