Remove unused patch

debian/patches/desktop-category.patch

@@ -1,11 +0,0 @@
---- a/resources/lxqt-about.desktop.in
-+++ b/resources/lxqt-about.desktop.in
-@@ -5,7 +5,7 @@
- Comment=Learn more about LXQt
- Exec=lxqt-about
- Icon=help-about
--Categories=Help;LXQt
-+Categories=System;Documentation
- OnlyShowIn=LXQt;LXDE;
- 
- #TRANSLATIONS_DIR=translations

debian/patches/series

@@ -1 +0,0 @@
-desktop-category.patch