Remove MySQLdb/release.py from git

because it's generated from `metadata.cfg`

and because I keep getting annoying diffs because of newline differences
-- e.g.:

    $ git diff
    diff --git a/MySQLdb/release.py b/MySQLdb/release.py
    index 5c30a6c..4ce9412 100644
    --- a/MySQLdb/release.py
    +++ b/MySQLdb/release.py
    @@ -1,4 +1,4 @@
    -
    -__author__ = "Andy Dustman <farcepest@gmail.com>"
    -version_info = (1,2,4,'final',1)
    -__version__ = "1.2.4"
    +
    +__author__ = "Andy Dustman <farcepest@gmail.com>"
    +version_info = (1,2,4,'final',1)
    +__version__ = "1.2.4"