This stripe state is not used anymore after commit 
51acbcec6c42b24
("md: remove CONFIG_MULTICORE_RAID456"), so remove the obsoleted
state.
gjiang@nb01257:~/md$ grep STRIPE_OPS_REQ_PENDING drivers/md/ -r
drivers/md/raid5.c:					  (1 << STRIPE_OPS_REQ_PENDING) |
drivers/md/raid5.h:	STRIPE_OPS_REQ_PENDING,
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
 
                                          (1 << STRIPE_FULL_WRITE) |
                                          (1 << STRIPE_BIOFILL_RUN) |
                                          (1 << STRIPE_COMPUTE_RUN)  |
-                                         (1 << STRIPE_OPS_REQ_PENDING) |
                                          (1 << STRIPE_DISCARD) |
                                          (1 << STRIPE_BATCH_READY) |
                                          (1 << STRIPE_BATCH_ERR) |
 
        STRIPE_FULL_WRITE,      /* all blocks are set to be overwritten */
        STRIPE_BIOFILL_RUN,
        STRIPE_COMPUTE_RUN,
-       STRIPE_OPS_REQ_PENDING,
        STRIPE_ON_UNPLUG_LIST,
        STRIPE_DISCARD,
        STRIPE_ON_RELEASE_LIST,