libgtk2: remove unneeded configure opts

This stuff is all handled by Makefile.autotools.in

package/libgtk2/libgtk2.mk

@@ -70,21 +70,7 @@ LIBGTK2_CONF_ENV = ac_cv_func_posix_getpwuid_r=yes glib_cv_stack_grows=no \
 		ac_cv_prog_F77=no \
 		ac_cv_path_CUPS_CONFIG=no
 
-LIBGTK2_CONF_OPT = --target=$(GNU_TARGET_NAME) --host=$(GNU_TARGET_NAME) \
-		--build=$(GNU_HOST_NAME) \
-		--prefix=/usr \
-		--exec-prefix=/usr \
-		--bindir=/usr/bin \
-		--sbindir=/usr/sbin \
-		--libdir=/usr/lib \
-		--libexecdir=/usr/lib \
-		--sysconfdir=/etc \
-		--datadir=/usr/share \
-		--localstatedir=/var \
-		--includedir=/usr/include \
-		--mandir=/usr/man \
-		--infodir=/usr/info \
-		--enable-shared \
+LIBGTK2_CONF_OPT = --enable-shared \
 		--enable-static \
 		--disable-glibtest \
 		--enable-explicit-deps=no \