Fix removal of barriers and delays from quantum circuit

src/qiskit_symb/utils.py

@@ -3,15 +3,14 @@
 import random
 from sympy import Symbol, sympify
 from qiskit import QuantumCircuit, transpile
-from qiskit.transpiler.passes import RemoveBarriers
 from .circuit.library import NAME_TO_INIT # pylint: disable=cyclic-import
 
 
 def get_init(name):
  """todo"""
  if name not in NAME_TO_INIT:
  raise NotImplementedError(
- f'Gate "{name}" is not implemented in qiskit-symb, use Qiskit transpiler!')
+ f'Instruction "{name}" is not implemented in qiskit-symb')
  return NAME_TO_INIT[name]
 
 
@@ -28,7 +27,8 @@ def flatten_circuit(circuit):
 
 def transpile_circuit(circuit):
  """todo"""
- circuit = RemoveBarriers()(circuit)
+ circuit.data = [
+ instr for instr in circuit if instr.operation.name not in ['barrier', 'delay']]
  return transpile(circuit, optimization_level=2)