pf: Remove __FBSDID() macro use

These are local additions that no longer make sense with the transition
to git.

This partially reverts a10f530f93.

Reviewed by:	kp, imp
Differential Revision:	https://reviews.freebsd.org/D42687

contrib/pf/authpf/authpf.c

@@ -16,9 +16,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
 #include <sys/types.h>
 #include <sys/file.h>
 #include <sys/ioctl.h>

contrib/pf/ftp-proxy/ftp-proxy.c

@@ -16,9 +16,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
 #include <sys/queue.h>
 #include <sys/types.h>
 #include <sys/time.h>

contrib/pf/pflogd/pflogd.c

@@ -30,9 +30,6 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/file.h>

contrib/pf/pflogd/privsep.c

@@ -17,9 +17,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/socket.h>