Remove unneeded desktop file

This is installed as part of the kpackage, but we don't read it anywhere.

It seems like it was a leftover from when it was relevant for KServiceTypeTrader.

containments/panel/plasma-containment-panel.desktop

-[Desktop Entry]
-Name=Empty Panel
-Name[ar]=لوحة فارغة
-Name[ast]=Panel baleru
-Name[az]=Boş Panel
-Name[bs]=Prazan panel
-Name[ca]=Plafó buit
-Name[ca@valencia]=Plafó buit
-Name[cs]=Prázdný panel
-Name[da]=Tomt panel
-Name[de]=Leere Kontrollleiste
-Name[el]=Κενός πίνακας
-Name[en_GB]=Empty Panel
-Name[es]=Panel vacío
-Name[et]=Tühi paneel
-Name[eu]=Panel hutsa
-Name[fi]=Tyhjä paneeli
-Name[fr]=Tableau de bord vide
-Name[ga]=Painéal Folamh
-Name[gl]=Panel baleiro
-Name[he]=לוח ריק
-Name[hr]=Prazan panel
-Name[hu]=Üres panel
-Name[ia]=Pannello vacue
-Name[id]=Panel Kosong
-Name[is]=Autt spjald
-Name[it]=Pannello vuoto
-Name[ja]=空のパネル
-Name[kn]=ಖಾಲಿ ಪುಟೀಪು (ಪ್ಯಾನಲ್)
-Name[ko]=빈 패널
-Name[lt]=Tuščias skydelis
-Name[mr]=रिकामे पटल
-Name[nb]=Tomt panel
-Name[nds]=Leddig Paneel
-Name[nl]=Leeg paneel
-Name[nn]=Tomt panel
-Name[pa]=ਖਾਲੀ ਪੈਨਲ
-Name[pl]=Pusty panel
-Name[pt]=Painel Vazio
-Name[pt_BR]=Painel vazio
-Name[ro]=Panou gol
-Name[ru]=Пустая панель
-Name[sk]=Prázdny panel
-Name[sl]=Prazen pult
-Name[sr]=празан панел
-Name[sr@ijekavian]=празан панел
-Name[sr@ijekavianlatin]=prazan panel
-Name[sr@latin]=prazan panel
-Name[sv]=Tom panel
-Name[ta]=காலியான பலகை
-Name[tg]=Лавҳаи холӣ
-Name[tr]=Boş Panel
-Name[uk]=Порожня панель
-Name[vi]=Bảng trống
-Name[x-test]=xxEmpty Panelxx
-Name[zh_CN]=空面板
-Name[zh_TW]=空白面板
-Comment=A simple linear panel
-Comment[ar]=لوحة خطّيّة بسيطة
-Comment[ast]=Un panel llinial cenciellu
-Comment[az]=Sadə xətti panel
-Comment[bs]=Jednostavan linearni panel
-Comment[ca]=Un plafó lineal senzill
-Comment[ca@valencia]=Un plafó lineal senzill
-Comment[cs]=Jednoduchý přímý panel
-Comment[da]=Et simpelt lineært panel
-Comment[de]=Eine einfache, gerade Kontrollleiste
-Comment[el]=Ένας απλός γραμμικός πίνακας
-Comment[en_GB]=A simple linear panel
-Comment[es]=Un sencillo panel lineal
-Comment[et]=Lihtne sirge paneel
-Comment[eu]=Panel lineal xume bat
-Comment[fi]=Yksinkertainen lineaarinen paneeli
-Comment[fr]=Un tableau de bord linéaire simple
-Comment[ga]=Painéal simplí líneach
-Comment[gl]=Un panel simple
-Comment[he]=לוח ישר פשוט
-Comment[hr]=Jednostavan pravocrtni panel
-Comment[hu]=Egy egyszerű, lineáris panel
-Comment[ia]=Un simple pannello linear
-Comment[id]=Panel linear sederhana
-Comment[is]=Einfalt línulegt spjald
-Comment[it]=Un semplice pannello lineare
-Comment[ja]=簡単なリニアパネル
-Comment[kk]=Жәй панель
-Comment[km]=បន្ទះ​លីនេអ៊ែរ​ធម្មតា
-Comment[kn]=ಒಂದು ಸರಳ ಹಾಗು ರೇಖೀಯ ಫಲಕ
-Comment[ko]=간단한 선형 패널
-Comment[lt]=Paprastas tiesinis skydelis
-Comment[lv]=Vienkāršs, lineārs panelis
-Comment[mr]=सोपे रेषीय पटल
-Comment[nb]=En enkelt lineært panel
-Comment[nds]=En eenfach liekweg Paneel
-Comment[nl]=Een eenvoudig lineair paneel
-Comment[nn]=Eit enkelt lineært panel
-Comment[pa]=ਸਧਾਰਨ ਲੀਨੀਅਰ ਪੈਨਲ
-Comment[pl]=Prosty, liniowy panel
-Comment[pt]=Um painel linear simples
-Comment[pt_BR]=Um painel linear simples
-Comment[ro]=Un panou liniar simplu
-Comment[ru]=Простая линейная панель
-Comment[sk]=Jednoduchý lineárny panel
-Comment[sl]=Preprost linearen pult
-Comment[sr]=Једноставан линеарни панел
-Comment[sr@ijekavian]=Једноставан линеарни панел
-Comment[sr@ijekavianlatin]=Jednostavan linearni panel
-Comment[sr@latin]=Jednostavan linearni panel
-Comment[sv]=En enkel linjär panel
-Comment[ta]=எளிய நேரோட்ட பலகை
-Comment[th]=พาเนลแนวยาวแบบพื้นฐาน
-Comment[tr]=Basit bir doğrusal panel
-Comment[ug]=ئاددىي بىر سىزىقلىق تاختا
-Comment[uk]=Проста лінійна панель
-Comment[vi]=Một bảng dạng thanh đơn giản
-Comment[wa]=On simpe et lineyåre sicriftôr
-Comment[x-test]=xxA simple linear panelxx
-Comment[zh_CN]=简单的线性面板
-Comment[zh_TW]=簡單的線性面板
-Icon=
-Type=Service
-X-KDE-ServiceTypes=Plasma/Applet,Plasma/Containment
-X-Plasma-ContainmentCategories=panel
-NoDisplay=true
-
-X-KDE-Library=plasma_containment_panel
-X-KDE-PluginInfo-Author=The Plasma Team
-X-KDE-PluginInfo-Email=plasma-devel@kde.org
-X-KDE-PluginInfo-Name=panel
-X-KDE-PluginInfo-Version=3.0
-X-KDE-PluginInfo-Website=https://www.kde.org/plasma-desktop
-X-KDE-PluginInfo-Category=Containments
-X-KDE-PluginInfo-License=GPL-2.0+
-X-KDE-PluginInfo-EnabledByDefault=true