HID: bpf: Artist24: remove unused variable

warning: unused variable ‘tilt’ [-Wunused-variable]
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://lore.kernel.org/r/20240608-hid_bpf_struct_ops-v3-12-6ac6ade58329@kernel.orgSigned-off-by: Benjamin Tissoires <bentiss@kernel.org>

drivers/hid/bpf/progs/XPPen__Artist24.bpf.c

@@ -158,7 +158,6 @@ int BPF_PROG(xppen_24_fix_eraser, struct hid_bpf_ctx *hctx)
 	__u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 10 /* size */);
 	__u8 current_state, changed_state;
 	bool prev_tip;
-	__u16 tilt;
 
 	if (!data)
 		return 0; /* EPERM check */