ipv6: Cleanup fib6_drop_pcpu_from()

Since commit 0e233874 ("ipv6: fix races in ip6_dst_destroy()"),
'table' is unused in __fib6_drop_pcpu_from(), no need pass it from
fib6_drop_pcpu_from().

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250701041235.1333687-1-yuehaibing@huawei.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>