hw/pci-host: Remove unused pci_host_data_be_ops

hw/pci-host: Remove unused pci_host_data_be_ops

pci_host_data_be_ops became unused after endianness fixes

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Rakesh Jeyasingh <rakeshjb010@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20250429170354.150581-3-rakeshjb010@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 560375cff3ccedabf1fe5ca1bc7a31b13fdc68e5)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>