RDMA/bnxt_re: Remove the unused variable en_dev

RDMA/bnxt_re: Remove the unused variable en_dev

Variable en_dev is not effectively used, so delete it.

drivers/infiniband/hw/bnxt_re/main.c:1980:22: warning: variable ‘en_dev’ set but not used.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=10867
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://patch.msgid.link/20240918021632.36091-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>