chore(desktop-file): remove ICED as a category

Author: ryanabx

data/com.system76.CosmicLauncher.desktop

@@ -4,7 +4,7 @@ Comment=COSMIC Launcher
 Type=Application
 Exec=cosmic-launcher
 Terminal=false
-Categories=COSMIC;ICED;
+Categories=COSMIC;
 # Translators: Search terms to find this application. Do NOT translate or localize the semicolons! The list MUST also end with a semicolon!
 Keywords=COSMIC;ICED;
 # Translators: Do NOT translate or transliterate this text (this is an icon file name)!