Git 1.5.0 and later no longer output useless messages to standard
error when making the initial (or what looks to be) commit of a
repository. Since /dev/null does not exist on Windows in the
MinGW environment we can't redirect there anyway. Since Git
does not output anymore, I'm removing the redirection.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>