rm unused import
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@ -754,7 +754,6 @@ pub fn integer_lit(s: &str, suffix: Option<&str>, sd: &SpanHandler, sp: Span) ->
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mod test {
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use super::*;
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use std::rc::Rc;
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use serialize::json;
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use codemap::{Span, BytePos, Pos, Spanned, NO_EXPANSION};
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use owned_slice::OwnedSlice;
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use ast;
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