infrastructure: remove leftover of old style hooks

Commit ae2be8d (infrastructure: remove support for old style hooks)
forgot to update an uninstall rule.

Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Daniel Hobi <daniel.hobi@schmid-telecom.ch>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/Makefile.package.in

@@ -324,7 +324,7 @@ $(BUILD_DIR)/%/.stamp_uninstalled:
 	$($(PKG)_UNINSTALL_STAGING_CMDS)
 	rm -f $($(PKG)_TARGET_INSTALL_STAGING)
 	$($(PKG)_UNINSTALL_TARGET_CMDS)
-	rm -f $($(PKG)_TARGET_INSTALL_TARGET) $($(PKG)_HOOK_POST_INSTALL)
+	rm -f $($(PKG)_TARGET_INSTALL_TARGET)
 
 # Remove package sources
 $(BUILD_DIR)/%/.stamp_dircleaned: