refactor: remove old clippy allow attributes

These lints either resolved themselves, or the code has changed such that
they no longer apply, hence they can be removed with no further changes.

`clippy::derivable_impls`
`clippy::needless_collect`
`clippy::almost_swapped`

crates/bdk/src/wallet/mod.rs

@@ -2290,9 +2290,6 @@ impl<D> Wallet<D> {
     ) -> Result<(), MiniscriptPsbtError> {
         // We need to borrow `psbt` mutably within the loops, so we have to allocate a vec for all
         // the input utxos and outputs
-        //
-        // Clippy complains that the collect is not required, but that's wrong
-        #[allow(clippy::needless_collect)]
         let utxos = (0..psbt.inputs.len())
             .filter_map(|i| psbt.get_utxo_for(i).map(|utxo| (true, i, utxo)))
             .chain(

crates/bdk/src/wallet/signer.rs

@@ -820,7 +820,6 @@ pub enum TapLeavesOptions {
     None,
 }
 
-#[allow(clippy::derivable_impls)]
 impl Default for SignOptions {
     fn default() -> Self {
         SignOptions {