configure: Remove check for IOKit (always present on macOS).

configure

@@ -7856,12 +7856,6 @@ then :
   printf "%s\n" "#define HAVE_EGL_EGL_H 1" >>confdefs.h
 
 fi
-ac_fn_c_check_header_compile "$LINENO" "IOKit/IOKitLib.h" "ac_cv_header_IOKit_IOKitLib_h" "$ac_includes_default"
-if test "x$ac_cv_header_IOKit_IOKitLib_h" = xyes
-then :
-  printf "%s\n" "#define HAVE_IOKIT_IOKITLIB_H 1" >>confdefs.h
-
-fi
 ac_fn_c_check_header_compile "$LINENO" "OpenCL/opencl.h" "ac_cv_header_OpenCL_opencl_h" "$ac_includes_default"
 if test "x$ac_cv_header_OpenCL_opencl_h" = xyes
 then :

configure.ac

@@ -408,7 +408,6 @@ AC_CHECK_HEADERS(\
 	AL/al.h \
 	CL/cl.h \
 	EGL/egl.h \
-	IOKit/IOKitLib.h \
 	OpenCL/opencl.h \
 	Security/Security.h \
 	SystemConfiguration/SCDynamicStoreCopyDHCPInfo.h \

dlls/ntdll/unix/cdrom.c

@@ -75,7 +75,7 @@
 # include <sys/scsiio.h>
 #endif
 
-#ifdef HAVE_IOKIT_IOKITLIB_H
+#ifdef __APPLE__
 # include <libkern/OSByteOrder.h>
 # include <sys/disk.h>
 # include <IOKit/IOKitLib.h>

dlls/ntdll/unix/system.c

@@ -54,14 +54,12 @@
 #ifdef HAVE_SYS_RESOURCE_H
 # include <sys/resource.h>
 #endif
-#ifdef HAVE_IOKIT_IOKITLIB_H
+#ifdef __APPLE__
 # include <CoreFoundation/CoreFoundation.h>
 # include <IOKit/IOKitLib.h>
 # include <IOKit/pwr_mgt/IOPM.h>
 # include <IOKit/pwr_mgt/IOPMLib.h>
 # include <IOKit/ps/IOPowerSources.h>
-#endif
-#ifdef __APPLE__
 # include <mach/mach.h>
 # include <mach/machine.h>
 # include <mach/mach_init.h>
@@ -3484,7 +3482,7 @@ static NTSTATUS fill_battery_state( SYSTEM_BATTERY_STATE *bs )
     return STATUS_SUCCESS;
 }
 
-#elif defined(HAVE_IOKIT_IOKITLIB_H)
+#elif defined(__APPLE__)
 
 static NTSTATUS fill_battery_state( SYSTEM_BATTERY_STATE *bs )
 {

include/config.h.in

@@ -111,9 +111,6 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
-/* Define to 1 if you have the <IOKit/IOKitLib.h> header file. */
-#undef HAVE_IOKIT_IOKITLIB_H
-
 /* Define to 1 if you have the `kqueue' function. */
 #undef HAVE_KQUEUE