Delete a line in Eclipse
Ctrl + D
From Help->Key Assist... there are all kinds of useful keyboard shortcuts for Eclipse.
For Mac users: ⌘ + D
In the future, if you need to quickly find a keyboard shortcut for something simple, just hit Ctrl+Shift+L.
Ctrl + D should delete the line.
You can reassign the Delete Line command to your favourite hotkey.
Window->Preferences
General->Editors->Keys.
Now type "Delete" and reassign the filtered commando.