configure: remove some unused HAVE_*_H macros

configure.ac

@@ -3575,7 +3575,7 @@ AC_ARG_ENABLE(macosx-audio,
 if test "x${enable_macosx_audio}" != "xno" &&
   (test "${SYS}" = "darwin" || test "${enable_macosx_audio}" = "yes")
 then
-  AC_CHECK_HEADERS(CoreAudio/CoreAudio.h,
+  AC_CHECK_HEADER([CoreAudio/CoreAudio.h],
     [ VLC_ADD_PLUGIN([auhal])
       VLC_ADD_LIBS([auhal],[-Wl,-framework,CoreAudio,-framework,AudioUnit,-framework,AudioToolbox,-framework,CoreServices])
     ], [ AC_MSG_ERROR([cannot find CoreAudio headers]) ])
@@ -3588,7 +3588,7 @@ AC_ARG_ENABLE(ios-audio,
   [  --enable-ios-audio       Audio module for iOS (default disabled)])
 if test "${enable_ios_audio}" = "yes"
 then
-  AC_CHECK_HEADERS(AudioUnit/AudioUnit.h,
+  AC_CHECK_HEADER([AudioUnit/AudioUnit.h],
     [ VLC_ADD_PLUGIN([audiounit_ios])
       VLC_ADD_LIBS([audiounit_ios],[-Wl,-framework,CoreAudio,-framework,AudioUnit,-framework,AudioToolbox,-framework,CoreServices])
     ], [ AC_MSG_ERROR([cannot find AudioUnit headers]) ])