spa: libcamera: clean up includes

Remove some unnecessarily includes.

(cherry picked from commit 5a9cdd724f)

spa/plugins/libcamera/libcamera-device.cpp

@@ -4,10 +4,7 @@
 /* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans <wim.taymans@gmail.com> */
 /* SPDX-License-Identifier: MIT */
 
-#include "config.h"
-
-#include <stddef.h>
-
+#include <cstddef>
 #include <sstream>
 
 #include <spa/support/plugin.h>

spa/plugins/libcamera/libcamera-manager.cpp

@@ -2,13 +2,7 @@
 /* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans */
 /* SPDX-License-Identifier: MIT */
 
-#include <stddef.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
+#include <cstddef>
 #include <utility>
 #include <mutex>
 #include <optional>
@@ -17,8 +11,6 @@
 #include <libcamera/camera.h>
 #include <libcamera/camera_manager.h>
 
-#include <linux/videodev2.h>
-
 using namespace libcamera;
 
 #include <spa/support/log.h>

spa/plugins/libcamera/libcamera-source.cpp

@@ -4,9 +4,6 @@
 /* SPDX-License-Identifier: MIT */
 
 #include <stddef.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
 #include <deque>
 #include <optional>
 

spa/plugins/libcamera/libcamera-utils.cpp

@@ -6,11 +6,8 @@
 
 #include <stdio.h>
 #include <string.h>
-#include <unistd.h>
-#include <sched.h>
 #include <errno.h>
 #include <sys/mman.h>
-#include <poll.h>
 #include <limits.h>
 
 #include <linux/media.h>