gui-apps/nwg-panel: cleanup files

Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>

gui-apps/nwg-panel/files/nwg-panel-0.9.20-fix-version-string.patch

@@ -1,17 +0,0 @@
-Typo in version string
-
-See also: https://github.com/nwg-piotr/nwg-panel/issues/281
-
-Pascal Jäger <pascal.jaeger@leimstift.de> (2024-01-10)
-
---- a/setup.py
-+++ b/setup.py
-@@ -8,7 +8,7 @@ def read(f_name):
- 
- setup(
-     name='nwg-panel',
--    version='0.9.20 ',
-+    version='0.9.20',
-     description='GTK3-based panel for sway and Hyprland Wayland compositors',
-     packages=find_packages(),
-     include_package_data=True,