Bluetooth: clean up error pointer checking

The bt_skb_sendmsg() function can't return NULL so there is no need to check for that. Several of these checks were removed previously but this one was missed.

---
 include/net/bluetooth/bluetooth.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 6b48d9e2aab9..a8b52175af05 100644
@@ -494,7 +494,7 @@ static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
 	struct sk_buff *skb, **frag;
 
 	skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
-	if (IS_ERR_OR_NULL(skb))
+	if (IS_ERR(skb))
 		return skb;
 
 	len -= skb->len;

2.35.1

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Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list. This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=661424

---Test result---

Test Summary:

CheckPatch                    PASS      1.37 seconds
GitLint                       PASS      0.56 seconds
SubjectPrefix                 PASS      0.30 seconds
BuildKernel                   PASS      45.84 seconds
BuildKernel32                 PASS      40.97 seconds
Incremental Build with patchesPASS      69.34 seconds
TestRunner: Setup             PASS      676.66 seconds
TestRunner: l2cap-tester      PASS      19.85 seconds
TestRunner: bnep-tester       PASS      7.13 seconds
TestRunner: mgmt-tester       PASS      118.69 seconds
TestRunner: rfcomm-tester     PASS      11.35 seconds
TestRunner: sco-tester        PASS      11.69 seconds
TestRunner: smp-tester        PASS      11.14 seconds
TestRunner: userchan-tester   PASS      7.73 seconds

---
Regards,
Linux Bluetooth