Fix broken import

src/provider/accelerator.py

@@ -7,10 +7,9 @@
 from qiskit import QuantumCircuit, transpile
 from qiskit_aer import AerSimulator
 
-from src.circuits import generate_subcircuit
 from src.common import IBMQBackend, CombinedJob
 from src.resource_estimation import estimate_runtime, estimate_noise
-from src.tools import optimize_circuit_online
+from src.tools import optimize_circuit_online, generate_subcircuit
 
 
 class Accelerator: