zfs_context: remove duplicate includes

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>

Author: behlendorf

include/sys/zfs_context.h

@@ -127,8 +127,6 @@ extern "C" {
 #include <sys/systm.h>
 #include <sys/misc.h>
 #include <sys/random.h>
-#include <sys/callb.h>
-#include <sys/trace.h>
 
 #include <sys/zfs_context_os.h>
 

scripts/spdxcheck.pl

@@ -124,7 +124,7 @@
 	include/os/freebsd/spl/sys/inttypes.h
 	include/os/freebsd/spl/sys/mode.h
 	include/os/freebsd/spl/sys/trace.h
-	include/os/freebsd/spl/sys/trace_zfs.h
+	include/os/freebsd/zfs/sys/trace_zfs.h
 	include/os/freebsd/zfs/sys/zpl.h
 	include/os/linux/kernel/linux/page_compat.h
 	lib/libspl/include/sys/string.h