IB/iser: Remove deprecated pi_guard module param

No need for this dead code. This commit doesn't change any functionality
since one can still run "modprobe ib_iser pi_guard=<type>".

Link: https://lore.kernel.org/r/20211215135721.3662-2-mgurtovoy@nvidia.comSigned-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/ulp/iser/iscsi_iser.c

@@ -113,10 +113,6 @@ bool iser_pi_enable = false;
 module_param_named(pi_enable, iser_pi_enable, bool, S_IRUGO);
 MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)");
 
-int iser_pi_guard;
-module_param_named(pi_guard, iser_pi_guard, int, S_IRUGO);
-MODULE_PARM_DESC(pi_guard, "T10-PI guard_type [deprecated]");
-
 static int iscsi_iser_set(const char *val, const struct kernel_param *kp)
 {
 	int ret;

drivers/infiniband/ulp/iser/iscsi_iser.h

@@ -486,7 +486,6 @@ struct iser_global {
 extern struct iser_global ig;
 extern int iser_debug_level;
 extern bool iser_pi_enable;
-extern int iser_pi_guard;
 extern unsigned int iser_max_sectors;
 extern bool iser_always_reg;