Remove redundant comment about .unwrap

Author: hegza

clippy_lints/src/default.rs

@@ -296,7 +296,6 @@ fn field_reassigned_by_stmt<'tcx>(this: &Stmt<'tcx>, binding_name: Symbol) -> Op
 fn fields_of_type(ty: Ty<'_>) -> Vec<Ident> {
     if let Adt(adt, _) = ty.kind() {
         if adt.is_struct() {
-            // unwrap is safe, because this is a struct and structs have only one variant
             let variant = &adt.non_enum_variant();
             return variant.fields.iter().map(|f| f.ident).collect();
         }