test: use direct create_info/RawArray imports, drop unused import mne

Address @drammock review on #14006: create_info and RawArray are already
imported directly at the top of the test module, so call them directly and
remove the now-unused `import mne`.

Author: CedricConday

mne/channels/tests/test_channels.py

@@ -14,7 +14,6 @@
 from numpy.testing import assert_allclose, assert_array_equal, assert_equal
 from scipy.io import savemat
 
-import mne
 from mne import (
     Epochs,
     EpochsArray,
@@ -701,8 +700,8 @@ def test_combine_channels_metadata():
 
 def test_pick_channels_orig_units_none():
     """Picking channels must not crash when _orig_units is None (gh-11314)."""
-    info = mne.create_info(["Fp1", "Fp2", "F3", "F4"], 100.0, "eeg")
-    raw = mne.io.RawArray(np.zeros((4, 100)), info)
+    info = create_info(["Fp1", "Fp2", "F3", "F4"], 100.0, "eeg")
+    raw = RawArray(np.zeros((4, 100)), info)
     raw._orig_units = None  # the state reported by some readers / RawArray flows
     raw.pick(["Fp1", "Fp2"])  # previously raised AttributeError on None.items()
     assert raw.ch_names == ["Fp1", "Fp2"]