net/avahi: drop qt4 slave handling (Qt4 deprecation)

Approved by:	portmgr (implicit)

net/avahi-app/Makefile

@@ -37,6 +37,7 @@ CONFIGURE_ARGS?=--with-distro=freebsd \
 		--disable-doxygen-doc \
 		--disable-doxygen-dot \
 		--disable-qt3 \
+		--disable-qt4 \
 		--localstatedir=/var \
 		--enable-compat-howl
 CPPFLAGS+=	-I${LOCALBASE}/include -DHAVE_KQUEUE
@@ -78,13 +79,6 @@ CONFIGURE_ARGS+=--enable-python
 .else
 CONFIGURE_ARGS+=--disable-python
 .endif
-.if ${AVAHI_SLAVE} == qt4
-CONFIGURE_ARGS+=--enable-qt4 \
-		--disable-expat \
-		--disable-gdbm
-.else
-CONFIGURE_ARGS+=--disable-qt4
-.endif
 .if ${AVAHI_SLAVE} == qt5
 CONFIGURE_ARGS+=--enable-qt5 \
 		--disable-expat \