Unpin IPython, and remove some dependencies on it.

ipykernel/inprocess/tests/test_kernel.py

@@ -13,10 +13,10 @@
 from ipykernel.inprocess.manager import InProcessKernelManager
 from ipykernel.inprocess.ipkernel import InProcessKernel
 from ipykernel.tests.utils import assemble_output
-from IPython.testing.decorators import skipif_not_matplotlib
 from IPython.utils.io import capture_output
 
 
+
 def _init_asyncio_patch():
     """set default asyncio policy to be compatible with tornado
 
@@ -60,9 +60,9 @@ def setUp(self):
         self.kc.start_channels()
         self.kc.wait_for_ready()
 
-    @skipif_not_matplotlib
     def test_pylab(self):
         """Does %pylab work in the in-process kernel?"""
+        matplotlib = pytest.importorskip('matplotlib', reason='This test requires matplotlib')
         kc = self.kc
         kc.execute('%pylab')
         out, err = assemble_output(kc.get_iopub_msg)

ipykernel/tests/test_kernel.py

@@ -14,7 +14,7 @@
 import pytest
 from packaging import version
 
-from IPython.testing import decorators as dec, tools as tt
+from IPython.testing import tools as tt
 import IPython
 from IPython.paths import locate_profile
 
@@ -225,8 +225,8 @@ def test_save_history():
         assert 'b="abcþ"' in content
 
 
-@dec.skip_without('faulthandler')
 def test_smoke_faulthandler():
+    faulthadler = pytest.importorskip('faulthandler', reason='this test needs faulthandler')
     with kernel() as kc:
         # Note: faulthandler.register is not available on windows.
         code = '\n'.join([
@@ -296,8 +296,8 @@ def test_complete():
         assert completed.startswith(cell)
 
 
-@dec.skip_without('matplotlib')
 def test_matplotlib_inline_on_import():
+    pytest.importorskip('matplotlib', reason='this test requires matplotlib')
     with kernel() as kc:
         cell = '\n'.join([
             'import matplotlib, matplotlib.pyplot as plt',

setup.py

@@ -64,7 +64,7 @@ def run(self):
         'importlib-metadata<5;python_version<"3.8.0"',
         'argcomplete>=1.12.3;python_version<"3.8.0"',
         'debugpy>=1.0.0,<2.0',
-        'ipython>=7.23.1,<8.0',
+        'ipython>=7.23.1',
         'traitlets>=5.1.0,<6.0',
         'jupyter_client<8.0',
         'tornado>=4.2,<7.0',