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[ BUILD # : 200509221800 ] [ JDK VERSION : 1.5.0_04 ] it would be nice if hints show you unused variables. I know this feature many other IDE.
6.0 shows them grayed out, though I do not think there is a hint to remove them. (You can use Refactor > Safe Delete to do so, or simply delete the declaration.)
If there are no objection I'll close this issue as fixed, since the highlighting of unused elements was already implemented