How to use awk or sed to remove files all double quotes

How to use awk or sed to remove any double quotes in the file

file config_20130101.dat does have a lot of double quotes , how to use awk, sed removed.

seeking shell
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echo '# include "stdio.h"' | sed 's / \ "/ / g'
recommend coolshell.cn sed on Tutorial:
http://coolshell.cn/articles/9104.html
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sed -i 's/"//g' config_20130101.dat