[tech] Disk space on mermaid

[Grahame Bowland]

Mermaid was down to almost no free space - in the order of 15Mb. Thats fairly
alarmingly low, so I've removed something large - the JDK. We've got 45Mb free
now so unless someone puts huge files in /tmp we'll be okay :)

Anyone wanting to do Java development should probably use mussel - using Java
on mermaid tended to slag it.

*waves*

-- 
Grahame Bowland

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