libgtk2: remove redundant INSTALL_TARGET

INSTALL_TARGET defaults to YES.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libgtk2/libgtk2.mk

@@ -10,7 +10,6 @@ LIBGTK2_VERSION = $(LIBGTK2_VERSION_MAJOR).18
 LIBGTK2_SOURCE = gtk+-$(LIBGTK2_VERSION).tar.xz
 LIBGTK2_SITE = http://ftp.gnome.org/pub/gnome/sources/gtk+/$(LIBGTK2_VERSION_MAJOR)
 LIBGTK2_INSTALL_STAGING = YES
-LIBGTK2_INSTALL_TARGET = YES
 LIBGTK2_LICENSE = LGPLv2+
 LIBGTK2_LICENSE_FILES = COPYING