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If you have an @return javadoc statement with nothing after it you get a configurable warning. There is no quickfix. If you have an @return javadoc statement on a method that returns nothing, you get a configurable warning with a quickfix to remove the offending line. The line removing quickfix should also be available for the first error. Also, if you use the quickfix to remove the line, and there is no other text in the javadoc statement, it should remove the /** */ entirely.
Move to JDT/UI