contrib: libaribcaption: don't force coretext option

It's automatically enabled for Apple targets and not used otherwise.

contrib/src/libaribcaption/rules.mak

@@ -11,21 +11,17 @@ LIBARIBCC_WITH_FREETYPE = 1
 
 ifdef HAVE_ANDROID
 LIBARIBCC_WITH_FONTCONFIG = 0
-LIBARIBCC_WITH_CORETEXT = 0
 LIBARIBCC_WITH_DIRECTWRITE = 0
 else
 ifdef HAVE_DARWIN_OS
 LIBARIBCC_WITH_FONTCONFIG = 0
-LIBARIBCC_WITH_CORETEXT = 1
 LIBARIBCC_WITH_DIRECTWRITE = 0
 else
 ifdef HAVE_WIN32
 LIBARIBCC_WITH_FONTCONFIG = 0
-LIBARIBCC_WITH_CORETEXT = 0
 LIBARIBCC_WITH_DIRECTWRITE = 1
 else
 LIBARIBCC_WITH_FONTCONFIG = 1
-LIBARIBCC_WITH_CORETEXT = 0
 LIBARIBCC_WITH_DIRECTWRITE = 0
 endif
 endif
@@ -65,12 +61,6 @@ else
 LIBARIBCC_CONF += -DARIBCC_USE_FONTCONFIG:BOOL=OFF
 endif
 
-ifeq ($(LIBARIBCC_WITH_CORETEXT), 1)
-LIBARIBCC_CONF += -DARIBCC_USE_CORETEXT:BOOL=ON
-else
-LIBARIBCC_CONF += -DARIBCC_USE_CORETEXT:BOOL=OFF
-endif
-
 ifeq ($(LIBARIBCC_WITH_DIRECTWRITE), 1)
 LIBARIBCC_CONF += -DARIBCC_USE_DIRECTWRITE:BOOL=ON
 endif