[gnome-calculator] i18n: remove UI test for translation

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 85c7dc8b028a62991c11e5fc0cc6b2b2f9836bb3
Author: Daniel Espinosa <esodan gmail com>
Date:   Sun Oct 20 17:56:11 2019 -0500

    i18n: remove UI test for translation

 po/POTFILES.skip | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 5cd6182d..439f30fb 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -21,3 +21,4 @@ src/math-window.c
 tests/test-equation.c
 tests/test-number.c
 tests/test-serializer.c
+tests/gci-test-entry-controller.ui