@@ -200,16 +200,10 @@
 			AC_MSG_ERROR([libobjc not found!])
 		])
 		;;
 esac
 
-AC_CHECK_FUNC(objc_getProperty,, [
-	AC_DEFINE(NEED_OBJC_PROPERTIES_INIT, 1,
-		[Whether objc_properties_init needs to be called])
-	AC_SUBST(OBJC_PROPERTIES_M, "objc_properties.m")
-])
-
 AC_CHECK_FUNC(objc_enumerationMutation, [
 	AC_DEFINE(HAVE_OBJC_ENUMERATIONMUTATION, 1,
 		[Whether we have objc_enumerationMutation])
 ])
 
@@ -375,16 +369,10 @@
 	AC_SUBST(OFTHREAD_M, "OFThread.m")
 	AC_SUBST(OFTHREADTESTS_M, "OFThreadTests.m")
 	AC_SUBST(OFHTTPREQUESTTESTS_M, "OFHTTPRequestTests.m")
 	AC_SUBST(THREADING_H, "threading.h")
 
-	AC_CHECK_FUNC(objc_sync_enter,, [
-		AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
-		AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
-			[Whether objc_sync_init needs to be called])
-	])
-
 	atomic_ops="none"
 
 	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
 	AC_EGREP_CPP(yes, [
 		#if defined(__GNUC__) && (defined(__i386__) || \