Remove optional sympy imports (#11662)

* remove optional sympy

* remove optional sympy

* remove optional sympy

* black,lint

test/python/pulse/test_pulse_lib.py

@@ -15,6 +15,7 @@
 import unittest
 from unittest.mock import patch
 import numpy as np
+import symengine as sym
 
 from qiskit.circuit import Parameter
 from qiskit.pulse.library import (
@@ -39,12 +40,6 @@
 
 from qiskit.pulse import functional_pulse, PulseError
 from qiskit.test import QiskitTestCase
-from qiskit.utils import optionals as _optional
-
-if _optional.HAS_SYMENGINE:
-    import symengine as sym
-else:
-    import sympy as sym
 
 
 class TestWaveform(QiskitTestCase):

test/python/qpy/test_block_load_from_qpy.py

@@ -17,6 +17,7 @@
 from ddt import ddt, data, unpack
 
 import numpy as np
+import symengine as sym
 
 from qiskit.pulse import builder, Schedule
 from qiskit.pulse.library import (
@@ -43,12 +44,6 @@
 from qiskit.pulse.configuration import Kernel, Discriminator
 
 
-if _optional.HAS_SYMENGINE:
-    import symengine as sym
-else:
-    import sympy as sym
-
-
 class QpyScheduleTestCase(QiskitTestCase):
     """QPY schedule testing platform."""
 

test/qpy_compat/test_qpy.py

@@ -427,7 +427,6 @@ def generate_control_flow_switch_circuits():
 def generate_schedule_blocks():
     """Standard QPY testcase for schedule blocks."""
     from qiskit.pulse import builder, channels, library
-    from qiskit.utils import optionals
 
     current_version = current_version_str.split(".")
     for i in range(len(current_version[2])):
@@ -469,10 +468,8 @@ def generate_schedule_blocks():
             builder.acquire(1000, channels.AcquireChannel(0), channels.MemorySlot(0))
     schedule_blocks.append(block)
     # Raw symbolic pulse
-    if optionals.HAS_SYMENGINE:
-        import symengine as sym
-    else:
-        import sympy as sym
+    import symengine as sym
+
     duration, amp, t = sym.symbols("duration amp t")  # pylint: disable=invalid-name
     expr = amp * sym.sin(2 * sym.pi * t / duration)
     my_pulse = library.SymbolicPulse(