Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"

The recent commit 87d0e2f41b8c ("usb: typec: ucsi: add a common
function ucsi_unregister_connectors()") introduced a regression that
caused NULL dereference at reading the power supply sysfs.  It's a
stale sysfs entry that should have been removed but remains with NULL
ops.  The commit changed the error handling to skip the entries after
a NULL con->wq, and this leaves the power device unreleased.

For addressing the regression, the straight revert is applied here.
Further code improvements can be done from the scratch again.

Link: https://bugzilla.suse.com/show_bug.cgi?id=1202386
Link: https://lore.kernel.org/r/[email protected]
Fixes: 87d0e2f41b8c ("usb: typec: ucsi: add a common function ucsi_unregister_connectors()")
Cc: <[email protected]>
Acked-by: Heikki Krogerus <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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