Remove IGE_MAC_VALA

It's no longer needed now that we detect the platform using uname.

configure.ac

@@ -33,8 +33,6 @@ if test "x$_gdk_tgt" = xquartz; then
    PKG_CHECK_MODULES(IGE_MAC, ige-mac-integration)
    AC_SUBST(IGE_MAC_LIBS)
    AC_SUBST(IGE_MAC_CFLAGS)
-   IGE_MAC_VALA="-D MAC_INTEGRATION"
-   AC_SUBST(IGE_MAC_VALA)
 fi
 
 GETTEXT_PACKAGE=spek

src/Makefile.am

@@ -17,8 +17,8 @@ INCLUDES = \
 	-DPKGLIBDIR=\""$(pkglibdir)"\"
 
 VALAFLAGS = \
-	--vapidir=$(srcdir)/../vapi --pkg config --pkg sys \
-	$(IGE_MAC_VALA) \
+	--vapidir=$(srcdir)/../vapi
+	--pkg config --pkg sys \
 	@SPEK_PACKAGES@
 
 spek_LDADD = \