package/libgtk4: remove schema compile hook

Dropping the need for this package to compile any schemas as the
libglib2 package (a dependency) already handles this during target
finalization.

Signed-off-by: James Knight <git@jdknight.me>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libgtk4/libgtk4.mk

@@ -80,12 +80,6 @@ else
 LIBGTK4_CONF_OPTS += -Dbuild-demos=false -Dbuild-examples=false
 endif
 
-define LIBGTK4_COMPILE_GLIB_SCHEMAS
-	$(HOST_DIR)/bin/glib-compile-schemas \
-		$(TARGET_DIR)/usr/share/glib-2.0/schemas
-endef
-LIBGTK4_POST_INSTALL_TARGET_HOOKS += LIBGTK4_COMPILE_GLIB_SCHEMAS
-
 # here, we build a native gtk4-update-icon-cache as host-libgtk4
 
 HOST_LIBGTK4_DEPENDENCIES = \