fusefs: minor cleanup in the tests

Delete some unused includes and member variables.

MFC after:	2 weeks
Sponsored by:	ConnectWise

tests/sys/fs/fusefs/allow_other.cc

@@ -52,9 +52,6 @@ const static char RELPATH[] = "some_file.txt";
 class NoAllowOther: public FuseTest {
 
 public:
-/* Unprivileged user id */
-int m_uid;
-
 virtual void SetUp() {
 	if (geteuid() != 0) {
 		GTEST_SKIP() << "This test must be run as root";

tests/sys/fs/fusefs/forget.cc

@@ -31,7 +31,6 @@
 extern "C" {
 #include <sys/types.h>
 #include <sys/mount.h>
-#include <sys/sysctl.h>
 
 #include <fcntl.h>
 #include <semaphore.h>

tests/sys/fs/fusefs/io.cc

@@ -31,7 +31,6 @@
 extern "C" {
 #include <sys/types.h>
 #include <sys/mman.h>
-#include <sys/sysctl.h>
 
 #include <fcntl.h>
 #include <stdlib.h>

tests/sys/fs/fusefs/notify.cc

@@ -30,7 +30,6 @@
 
 extern "C" {
 #include <sys/types.h>
-#include <sys/sysctl.h>
 
 #include <fcntl.h>
 #include <pthread.h>