remove unused imports

qiskit/circuit/library/data_preparation/state_preparation.py

@@ -11,7 +11,6 @@
 # that they have been altered from the originals.
 """Prepare a quantum state from the state where all qubits are 0."""
 
-import cmath
 from typing import Union, Optional
 
 import math
@@ -21,11 +20,9 @@
 from qiskit.circuit.quantumcircuit import QuantumCircuit
 from qiskit.circuit.quantumregister import QuantumRegister
 from qiskit.circuit.gate import Gate
-from qiskit.circuit.library.standard_gates.x import CXGate, XGate
+from qiskit.circuit.library.standard_gates.x import XGate
 from qiskit.circuit.library.standard_gates.h import HGate
 from qiskit.circuit.library.standard_gates.s import SGate, SdgGate
-from qiskit.circuit.library.standard_gates.ry import RYGate
-from qiskit.circuit.library.standard_gates.rz import RZGate
 from qiskit.circuit.library.generalized_gates import Isometry
 from qiskit.circuit.exceptions import CircuitError
 from qiskit.quantum_info.states.statevector import (