s390/net: Delete useless checks before function calls

The function debug_unregister() tests whether its argument is
NULL and then returns immediately. Thus the test around the call
is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/claw.c

@@ -109,9 +109,7 @@ static debug_info_t *claw_dbf_trace;
 static void
 claw_unregister_debug_facility(void)
 {
-	if (claw_dbf_setup)
 	debug_unregister(claw_dbf_setup);
-	if (claw_dbf_trace)
 	debug_unregister(claw_dbf_trace);
 }
 

drivers/s390/net/lcs.c

@@ -88,9 +88,7 @@ static debug_info_t *lcs_dbf_trace;
 static void
 lcs_unregister_debug_facility(void)
 {
-	if (lcs_dbf_setup)
 	debug_unregister(lcs_dbf_setup);
-	if (lcs_dbf_trace)
 	debug_unregister(lcs_dbf_trace);
 }
 

drivers/s390/net/netiucv.c

@@ -487,11 +487,8 @@ DEFINE_PER_CPU(char[256], iucv_dbf_txt_buf);
 
 static void iucv_unregister_dbf_views(void)
 {
-	if (iucv_dbf_setup)
 	debug_unregister(iucv_dbf_setup);
-	if (iucv_dbf_data)
 	debug_unregister(iucv_dbf_data);
-	if (iucv_dbf_trace)
 	debug_unregister(iucv_dbf_trace);
 }
 static int iucv_register_dbf_views(void)