[gimp] po-python: remove py-slice from POTFILES.in.

[Jehan <jehanp src gnome org>]

commit 164907384cf736aa43b7bb4152e66fc6694db5fe
Author: Jehan <jehan girinstud io>
Date:   Tue Dec 15 03:10:41 2020 +0100

    po-python: remove py-slice from POTFILES.in.
    
    This should fix the CI build.

 po-python/POTFILES.in | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/po-python/POTFILES.in b/po-python/POTFILES.in
index 687b66f00e..a9dfd6f26a 100644
--- a/po-python/POTFILES.in
+++ b/po-python/POTFILES.in
@@ -11,7 +11,6 @@ plug-ins/python/histogram-export.py
 plug-ins/python/palette-offset.py
 plug-ins/python/palette-sort.py
 plug-ins/python/palette-to-gradient.py
-plug-ins/python/py-slice.py
 plug-ins/python/python-console/python-console.py
 plug-ins/python/python-eval.py
 plug-ins/python/spyro-plus.py