Remaining IWYU cleanups

Author: JHartzer

hidtest/test.c

@@ -19,7 +19,6 @@
 #include <wchar.h>
 #include <string.h>
 #include <stdlib.h>
-
 #include <hidapi.h>
 
 // Headers needed for sleeping.

libusb/hid.c

@@ -26,16 +26,14 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <ctype.h>
 #include <locale.h>
 #include <errno.h>
 
 /* Unix */
 #include <unistd.h>
 #include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/utsname.h>
 #include <fcntl.h>
 #include <wchar.h>
 

linux/hid.c

@@ -26,24 +26,26 @@
 #include <stdlib.h>
 #include <locale.h>
 #include <errno.h>
-
 /* Unix */
 #include <unistd.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
-#include <sys/utsname.h>
 #include <fcntl.h>
 #include <poll.h>
+#include <linux/types.h>
+#include <linux/hid.h>
+#include <stdarg.h>
+#include <wchar.h>
 
 /* Linux */
 #include <linux/hidraw.h>
-#include <linux/version.h>
 #include <linux/input.h>
 #include <libudev.h>
 
 #include "hidapi.h"
 
+struct udev_device;
+
 #ifdef HIDAPI_ALLOW_BUILD_WORKAROUND_KERNEL_2_6_39
 /* This definitions first appeared in Linux Kernel 2.6.39 in linux/hidraw.h.
     hidapi doesn't support kernels older than that,

mac/hid.c

@@ -29,12 +29,15 @@
 #include <CoreFoundation/CoreFoundation.h>
 #include <mach/mach_error.h>
 #include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
 #include <wchar.h>
 #include <locale.h>
 #include <pthread.h>
 #include <sys/time.h>
 #include <unistd.h>
 #include <dlfcn.h>
+#include <errno.h>
 
 #include "hidapi_darwin.h"