Need convenience command for removing news fragment files

New submission from jml <[email protected]>:

After running `build-news` as part of the ReleaseProcess and then reviewing and committing the changes, we need to delete the news fragment files (e.g. `2155.bugfix`).

Unfortunately, doing this correctly is a bit of a pain. My best guess...

`find . -name '*.bugfix' -or -name '*.misc' -or -name '*.feature' -or -name '*.removal' | xargs svn rm`

This should be simpler.

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Type     : enhancement
Component: core
Keywords : 
Priority : normal
Nosy     : 
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http://twistedmatrix.com/trac/ticket/4315