Remove impossible skipif.

According to the dependencies in setup.py those will never be skipped.

ipykernel/tests/test_async.py

@@ -26,21 +26,14 @@ def teardown_function():
     KM.shutdown_kernel(now=True)
 
 
-skip_without_async = pytest.mark.skipif(
-    sys.version_info < (3, 5) or V(IPython.__version__) < V("7.0"),
-    reason="IPython >=7 with async/await required",
-)
 
-
-@skip_without_async
 def test_async_await():
     flush_channels(KC)
     msg_id, content = execute("import asyncio; await asyncio.sleep(0.1)", KC)
     assert content["status"] == "ok", content
 
 
 @pytest.mark.parametrize("asynclib", ["asyncio", "trio", "curio"])
-@skip_without_async
 def test_async_interrupt(asynclib, request):
     try:
         __import__(asynclib)

ipykernel/tests/test_eventloop.py

@@ -28,7 +28,6 @@ def teardown():
 """
 
 
-@pytest.mark.skipif(sys.version_info < (3, 5), reason="async/await syntax required")
 @pytest.mark.skipif(tornado.version_info < (5,), reason="only relevant on tornado 5")
 def test_asyncio_interrupt():
     flush_channels(KC)

ipykernel/tests/test_kernel.py

@@ -415,10 +415,6 @@ def test_interrupt_with_message():
         validate_message(reply, 'execute_reply', msg_id)
 
 
-@pytest.mark.skipif(
-    version.parse(IPython.__version__) < version.parse("7.14.0"),
-    reason="Need new IPython"
-)
 def test_interrupt_during_pdb_set_trace():
     """
     The kernel exits after being interrupted while waiting in pdb.set_trace().