remove qobj backend run (#32)

* remove qobj backend run

* fix lint

Co-authored-by: Rathish Cholarajan <rathishc24@gmail.com>

test/ibmq/test_ibmq_qasm_simulator.py

@@ -15,7 +15,7 @@
 from unittest import mock
 
 from qiskit import ClassicalRegister, QuantumCircuit, QuantumRegister
-from qiskit.compiler import transpile, assemble
+from qiskit.compiler import transpile
 from qiskit.test.reference_circuits import ReferenceCircuits
 from qiskit.providers.aer.noise import NoiseModel
 
@@ -133,8 +133,6 @@ def _new_submit(qobj, *args, **kwargs):
             backend._submit_job = _new_submit
             circ = transpile(ReferenceCircuits.bell(), backend=backend)
             backend.run(circ, header={'test': 'circuits'})
-            qobj = assemble(circ, backend=backend, header={'test': 'qobj'})
-            backend.run(qobj)
         finally:
             backend._configuration._data['simulation_method'] = sim_method
             backend._submit_job = submit_fn
@@ -156,8 +154,6 @@ def _new_submit(qobj, *args, **kwargs):
             backend._submit_job = _new_submit
             circ = transpile(ReferenceCircuits.bell(), backend=backend)
             backend.run(circ, method='my_method', header={'test': 'circuits'})
-            qobj = assemble(circ, backend=backend, method='my_method', header={'test': 'qobj'})
-            backend.run(qobj)
         finally:
             backend._configuration._data['simulation_method'] = sim_method
             backend._submit_job = submit_fn