ANDROID: GKI: fix build in scsi_lib.c

In commit 668ef6c5 ("scsi: core: Don't memset() the entire scsi_cmnd
in scsi_init_command()"), the cmd->submitter field is accessed, but due
to previous Android-ABI breaking commits being reverted, this is not a
valid field in the scsi command structure.  So remove the line, fixing
the build properly.

Fixes: 668ef6c5 ("scsi: core: Don't memset() the entire scsi_cmnd in scsi_init_command()")
Change-Id: I4523d86c142a25acae0b28d249e5e6f6a0189d72
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>