Fix stable clippy warnings (#16052)

This commit fixes clippy warnings that appear when running clippy from
the latest stable Rust release 1.95.0. Fixing this pre-emptively will
avoid errors when we try to bump our MSRV in the future and also fix
the error for those of use that insist on testing with the latest
stable release of Rust and are seeing clippy complain about this.

Author: mtreinish

crates/circuit/src/circuit_data.rs

@@ -984,12 +984,12 @@ impl CircuitData {
     pub fn pack(&mut self, py: Python, inst: &CircuitInstruction) -> PyResult<PackedInstruction> {
         let qubits = self.qargs_interner.insert_owned(
             self.qubits
-                .map_objects(inst.qubits.extract::<Vec<ShareableQubit>>(py)?.into_iter())?
+                .map_objects(inst.qubits.extract::<Vec<ShareableQubit>>(py)?)?
                 .collect(),
         );
         let clbits = self.cargs_interner.insert_owned(
             self.clbits
-                .map_objects(inst.clbits.extract::<Vec<ShareableClbit>>(py)?.into_iter())?
+                .map_objects(inst.clbits.extract::<Vec<ShareableClbit>>(py)?)?
                 .collect(),
         );
         let params = self.extract_blocks_from_circuit_parameters(inst.params.as_ref());

crates/circuit/src/dag_circuit.rs

@@ -6391,8 +6391,7 @@ impl DAGCircuit {
                         op_node
                             .instruction
                             .qubits
-                            .extract::<Vec<ShareableQubit>>(py)?
-                            .into_iter(),
+                            .extract::<Vec<ShareableQubit>>(py)?,
                     )?
                     .collect(),
             );
@@ -6402,8 +6401,7 @@ impl DAGCircuit {
                         op_node
                             .instruction
                             .clbits
-                            .extract::<Vec<ShareableClbit>>(py)?
-                            .into_iter(),
+                            .extract::<Vec<ShareableClbit>>(py)?,
                     )?
                     .collect(),
             );

crates/synthesis/src/discrete_basis/math.rs

@@ -106,10 +106,8 @@ fn rotation_axis_from_so3(matrix: &Matrix3<f64>, do_checks: bool) -> Matrix3x1<f
                 axis[2] *= -1.;
             }
         }
-        1 => {
-            if matrix[(1, 2)] < 0. {
-                axis[2] *= -1.;
-            }
+        1 if matrix[(1, 2)] < 0. => {
+            axis[2] *= -1.;
         }
         _ => (),
     };