Clean up metadata.desktop

Update `metadata.desktop` based on the example on the tutorial.
https://develop.kde.org/docs/extend/plasma/kwin/

Author: esjeon

metadata.desktop

@@ -10,15 +10,10 @@ X-KDE-PluginInfo-Author=Eon S. Jeon
 X-KDE-PluginInfo-Email=esjeon@hyunmu.am
 X-KDE-PluginInfo-Name=forceblur
 X-KDE-PluginInfo-Version=0.5
-
-X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=MIT
-X-KDE-ServiceTypes=KWin/Script,KCModule
-
-X-KDE-Library=kwin/effects/configs/kcm_kwin4_genericscripted
-X-KDE-PluginKeyword=forceblur
-X-KDE-ParentComponents=forceblur
 
 Type=Service
+X-KDE-ServiceTypes=KWin/Script
+X-Plasma-API=javascript
 
 X-KDE-ConfigModule=kwin/effects/configs/kcm_kwin4_genericscripted