usb: renesas-xhci: Remove renesas_xhci_pci_exit()

[ Upstream commit 884c2744 ]

Remove empty function renesas_xhci_pci_exit() that does not
actually do anything.

Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Link: https://lore.kernel.org/r/20210718015111.389719-3-mdf@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: f81dfa3b ("xhci: Set quirky xHC PCI hosts to D3 _after_ stopping and freeing them.")
Signed-off-by: Sasha Levin <sashal@kernel.org>